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HCID 7500作成日：2026年10月27日

エチルベンゼン

エチルベンゼン · エチルベンゼン (1mg/mlメタノール溶液) [水質分析用] · エチルベンゼン CRM4021-A · エチルベンゼン標準品 · エチルベンゼン CRM4021‐A · エチルベンゼン PURISS. P.A.,≥99.0% (GC) · エチルベンゼン REAGENTPLUS,99% · フェニルエタン

https://huagongshe.com/ja/chemical/7500

エチルベンゼン の分子構造式

識別子と物理属性

CAS No.100-41-4
分子式C8H10
平均分子量106.16 g/mol
単同位体質量106.07825032 g/mol
SMILESCCc1ccccc1
InChIKeyYNQLUTRBYVCPMQ-UHFFFAOYSA-N
PubChem CID7500
ChEMBLCHEMBL371561
ChEBICHEBI:16101
EC No.202-849-4
DTXSIDDTXSID3020596
現地名エチルベンゼン

化学・物理的性質

XLogP3.1
極性表面積0
水素結合供与体数0
水素結合受容体数0
回転可能結合数1
重原子数8
形式電荷0
複雑度51
LogP（分配係数）log Kow = 3.15
臭いAromatic odorPungent odorSweet, gasoline-like odor芳香族。
密度0.867 at 68 °F (USCG, 1999) - Less dense than waterwill float0.8626 g/cu cm at 25 °CDensity of saturated vapor-air mixture at 760 mm Hg (air= 1): 1.03 (26 °C)specific dispersion: 174.6Cricital density: 2.67 mmol/cu mcritical volume: 374.0 cu m/molRelative density (water = 1): 0.90.870.867 g/mL at 25 °C(lit.)
Viscosity0.64 cP at 25 °C0.6 mm²/s at 25 °C
Color/FormColorless liquid
溶解度less than 1 mg/mL at 73 °F (NTP, 1992)In water, 170 mg/L at 25 °C (average of 16 literature ranging from 131-212 mg/L at 25 °C)In water, 169 mg/L at 25 °CIn water, 0.014 g/100 mL at 15 °CSoluble in all proportions in ethyl alcohol and ethyl etherFor more Solubility (Complete) data for ETHYLBENZENE (8 total), please visit the HSDB record page.0.2g/リットル0.0206g/100mL
引火点59 °F (NTP, 1992)12.8 °C15.0 °C (59.0 °F) - closed cup64 °F (18 °C) - closed cup70 °F (21 °C) - closed cup18 °C c.c.72 °F
沸点277.2 °F at 760 mmHg (NTP, 1992)136.2 °C136 °C277 °F136.2 °C @760 [mm Hg]136 °C(lit.)
DecompositionHazardous decomposition products formed under fire conditions - Carbon oxides.When heated to decomposition it emits acrid smoke and irritating fumes.
融点-139 °F (NTP, 1992)-94.95 °C-95 °C-94.9 °C−95 °C(lit.)
蒸気密度3.66 (NTP, 1992) - Heavier than airwill sink (Relative to Air)3.66 (Air = 1)Relative vapor density (air = 1): 3.73.7 (vs air)
臭気閾値Odor Threshold Low: 0.09 [ppm]Odor Threshold High: 0.6 [ppm]Odor threshold from AIHA140 ppm /Purity not specified/2-2.6 mg/cu mdetection: 0.4 mg/cu m /Purity not specified/Odor Low: 8.7 mg/cu m, Odor High: 870.0 mg/cu m
蒸気圧28.69 psi ( 55 °C)
屈折率n20/D 1.495(lit.)
貯蔵条件Store below +30°C.
外観・状態液体
色無色
爆発限界1.0-7.8%(V)
臭気閾値0.17ppm
凝固点-95℃
比熱容量Cp(liquid): 1.73 J/(g·K), at 25℃
Merck14,3765
BRN1901871
ヘンリー定数13.9(x 10-3 atmm3/mol) at 45.00 °C, 15.1 at 50.00 °C, 17.1 at 55.00 °C, 20.1 at 60.00 °C, 20.9 at 65.00 °C, 22.7 at 70.00 °C, 34.3 at 80.00 °C (static headspace-GC, Park et al., 2004)
誘電率2.5(20℃)
安定性安定。酸化剤と相容れない。可燃性。
化粧品成分の機能香料
InChI1S/C8H10/c1-2-8-6-4-3-5-7-8/h3-7H,2H2,1H3
InChIKeyYNQLUTRBYVCPMQ-UHFFFAOYSA-N
SMILESCCc1ccccc1
LogP（分配係数）3.03-3.6 at 20℃
表面張力28.79mN/m at 298.15K
CAS データベース100-41-4(CAS DataBase Reference)
NISTの化学物質情報Ethylbenzene(100-41-4)
EPAの化学物質情報Ethylbenzene (100-41-4)

化学的特性

Ethylbenzene is a colorless liquid. Pungent aromatic odor. The Odor Threshold is 0.0920.60 ppm

化学性质

芳香族炭化水素の一种で，繊維，樹脂，洗剤および各種有機薬品類などの基幹工業原料として重要である。

安全性と法規制

GHS 分類DangerH225: Highly Flammable liquid and vapor [Danger Flammable liquids]H304: May be fatal if swallowed and enters airways [Danger Aspiration hazard]H332: Harmful if inhaled [Warning Acute toxicity, inhalation]H373: May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]P210, P233, P240, P241, P242, P243, P260, P261, P271, P280, P301+P316, P303+P361+P353, P304+P340, P317, P319, P331, P370+P378, P403+P235, P405, and P501 (click each P-code to see the statement)This chemical does not meet GHS hazard criteria for < 0.1% (2 of 7017) of reports.
規制情報Chemical: Benzene, ethyl-Hazard Traits - CarcinogenicityDevelopmental ToxicityEndocrine ToxicityHepatotoxicity and Digestive System ToxicityNephrotoxicity and Other Toxicity to the Urinary SystemNeurotoxicityOcular ToxicityRespiratory ToxicityAuthoritative List - ATSDR NeurotoxicantsCA MCLsCA TACsCWA 303(c)CWA 303(d)IARC Carcinogens - 2BOEHHA RELsProp 65Report - regardless of intended function of ingredient in the productBenzene, ethyl- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Benzene, ethyl- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 07-03-2023 https://echa.europa.eu/registration-dossier/-/registered-dossier/15377Status: No longer Valid Update: 24-10-2011 https://echa.europa.eu/registration-dossier/-/registered-dossier/7855Benzene, ethyl-: HSNO Approval: HSR001151 Approved with controlsThe New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)
その他の安全情報IMAP assessments - Benzene, ethyl-: Environment tier I assessment

用途

解説

C8H10(106.17)．C6H5C2H5．石油精製の際のキシレン留分中に含まれるが，ベンゼンにエテンをフリーデル-クラフツ付加させて製造される．無色の液体．融点－94.4 ℃，沸点136 ℃．d2040.8671．n20D1.4960．引火点20 ℃．多くの有機溶剤とまざる．脱水素してスチレンを製造する．[CAS 100-41-4]森北出版「化学辞典（第2版）

用途

スチレンモノマー合成原料,有機合成原料,塗料?インキ?接着剤溶剤、NITE初期リスク評価書;スチレン原料,有機合成原料、SRI:CHEMICAL ECONOMICS HANDBOOK;スチレンモノマー原料,有機合成原料,溶剤,ラッカーの希釈剤、化学工業日報社

用途

エチルベンゼンは，水に不溶，ほとんどの有機溶媒と均一に混ざる(溶ける)。ベンゼン，トルエン，キシレンとともに主要な芳香族石油化学製品の一つであり，広範で重要な主要化学原料である。工業的には，主として，ベンゼンを酸触媒(液相法では塩化アルミニウムなど，気相法ではリン酸‐担体)を用いエチレンでアルキル化して製造される。

用途

スチレンの合成、有機合成原料、溶剤

天然物の起源

Has apparently not been reported to occur in nature.

使用

Anesthetic. Ethylbenzene is almost exclusively (> 99%) used as an intermediate for the production of styrene monomer. Less than 1 % of the ethylbenzene produced is used as a paint solvent or as an intermediate for the production of diethylbenzene and acetophenone (IARC 2000). Ethylbenzene is a constituent (15-20%) of commercial xylene (“mixed xylenes”), and hence used as a component of solvents, as a diluent in paints and lacquers, and as a solvent in the rubber and chemical manufacturing industries (WHO 1996). Ethylbenzene has been added to motor and aviation fuels because of its anti-knock properties. Estimates of ethylbenzene in gasoline have ranged from <1-2.7%. (IARC 2000).

一般的な説明

A clear colorless liquid. Flash point 59°F. Less dense than water (at 7.2 lb / gal) and insoluble in water. Hence floats on water. Vapors heavier than air. Used as a solvent and to make other chemicals.Sweet. but somewhat "gassy" odor. If at all reminiscent of any natural material, it would be a Hyacinth-type of gassy sweetness.

使用用途

エチルベンゼンは低級アルキルベンゼンの一種です。一般的にはエチレンとベンゼンを原料とした触媒反応によって作られていますが、キシレンから分離することで製造することもあります。 エチルベンゼンは主にスチレンモノマーの原料として使われています。その他に、塗料や、インキなどの溶剤としても用いられています。また、上記の通りキシレンにもエチルベンゼンは一定量含まれており、灯油やガソリンにも1%程度含まれています。

製法・合成法

調製方法

Ethylbenzene is produced by alkylation of benzene with ethylene, except for a very small fraction that is recovered from mixed C8 aromatics by superfractionation. The reaction takes place on acidic catalysts and can be carried out either in the liquid or vapor phase.

製造方法

By Friedel-Crafts reaction on benzene, ethylbromide and aluminium chloride (Arc tander, 1969). Ethylbenzene is manufactured by alkylation from benzene and ethylene.

合成方法

重質ナフサを原料とした接触改質装置からの改質油（リフォーメート）を用いて製造される。

IMAP assessments - Benzene, ethyl-: Human health tier II assessment
輸送ラベル（DOT）Flammable Liquid
火災危険Special Hazards of Combustion Products: Irritating vapors are generated when heated.Behavior in Fire: Vapor is heavier than air and may travel considerable distance to the source of ignition and flash back. (USCG, 1999)· HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.· Vapors may form explosive mixtures with air.· Vapors may travel to source of ignition and flash back.· Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas (sewers, basements, tanks, etc.).· Vapor explosion hazard indoors, outdoors or in sewers.· Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.· Runoff to sewer may create fire or explosion hazard.· Containers may explode when heated.· Many liquids will float on water.Highly flammable. Vapour/air mixtures are explosive.
火災の可能性A very dangerous fire ... hazard when exposed to heat or flame ...
健康有害性Inhalation may cause irritation of nose, dizziness, depression. Moderate irritation of eye with corneal injury possible. Irritates skin and may cause blisters. (USCG, 1999)· May cause toxic effects if inhaled or absorbed through skin.· Inhalation or contact with material may irritate or burn skin and eyes.· Fire will produce irritating, corrosive and/or toxic gases.· Vapors may cause dizziness or asphyxiation, especially when in closed or confined areas.· Runoff from fire control or dilution water may cause environmental contamination.
有害性の概要Ethylbenzene is a colorless, flammable liquid that smells like gasoline. It is found in natural products such as coal tar and petroleum and is also found in manufactured products such as inks, insecticides, and paints. Ethylbenzene is used primarily to make another chemical, styrene. Other uses include as a solvent, in fuels, and to make other chemicals.Ethylbenzene is mainly used in the manufacture of styrene. Acute (short-term) exposure to ethylbenzene in humans results in respiratory effects, such as throat irritation and chest constriction, irritation of the eyes, and neurological effects such as dizziness. Chronic (long-term) exposure to ethylbenzene by inhalation in humans has shown conflicting results regarding its effects on the blood. Animal studies have reported effects on the blood, liver, and kidneys from chronic inhalation exposure to ethylbenzene. Limited information is available on the carcinogenic effects of ethylbenzene in humans. In a study by the National Toxicology Program (NTP), exposure to ethylbenzene by inhalation resulted in an increased incidence of kidney and testicular tumors in rats, and lung and liver tumors in mice. EPA has classified ethylbenzene as a Group D, not classifiable as to human carcinogenicity.Liquid causes first degree burns on short exposure. [CHRIS] Mild irritation but no corneal injury after instillation of 2 drops into rabbit eyeRats with inhalation exposure to 400 ppm (but not 300 ppm) eight hours per day for five days had increased auditory thresholds and loss of cochlear hair cellsMild liver toxicity observed in animal inhalation studiesCauses CNS depression in lethal concentration studiesWhen exposed at 1000 ppm, humans have profuse lacrimation. 2021 ACGIH Basis: irritation of upper respiratory tract, eye irritation, ototoxicity, kidney effects and CNS impairment[ACGIH]
輸送番号・ガイド（DOT）1175 130
反応性グループHydrocarbons, Aromatic
EC 分類Symbol: F, XnR: 11-20S: (2)-16-24/25-29
UN 分類UN Hazard Class: 3UN Pack Group: II
Special ReportsHaley TJ, A Review of Literature on EthylbenzeneDangerous Prop Ind Mater Rep 1 (6): 2 (1981). A review with 39 references on chemistry, metabolism, pharmacology & toxicity of ethylbenzene.USEPAAmbient Water Quality Criteria Document: Ethylbenzene (1980) EPA No. 440/5-8-048.Environment CanadaTech Info for Problem Spills: Ethylbenzene (Draft) (1982)Fishbein LEthylbenzene in An Overview of Environmental and Toxicological Aspects of Aromatic HydrocarbonsSci Total Environ 44 (3): 269-88 (1985)For more Special Reports (Complete) data for ETHYLBENZENE (10 total), please visit the HSDB record page.
消火Excerpt from ERG Guide 130 [Flammable Liquids (Water-Immiscible / Noxious)]:CAUTION: The majority of these products have a very low flash point. Use of water spray when fighting fire may be inefficient.SMALL FIRE: Dry chemical, CO2, water spray or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam.LARGE FIRE: Water spray, fog or regular foam. If regular foam is ineffective or unavailable, use alcohol-resistant foam. Avoid aiming straight or solid streams directly onto the product. If it can be done safely, move undamaged containers away from the area around the fire.FIRE INVOLVING TANKS, RAIL TANK CARS OR HIGHWAY TANKS: Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks in direct contact with flames. For massive fire, use unmanned master stream devices or monitor nozzlesif this is impossible, withdraw from area and let fire burn. (ERG, 2024)Use dry powder, foam, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.
応急処置措置Fresh air, rest. Refer for medical attention.Remove contaminated clothes. Rinse and then wash skin with water and soap.First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.Rinse mouth. Do NOT induce vomiting. Refer for medical attention .
漏出応急措置· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.· Keep unauthorized personnel away.· Stay upwind, uphill and/or upstream.· Ventilate closed spaces before entering, but only if properly trained and equipped.· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.· All equipment used when handling the product must be grounded.· Do not touch or walk through spilled material.· Stop leak if you can do it without risk.· Prevent entry into waterways, sewers, basements or confined areas.· A vapor-suppressing foam may be used to reduce vapors.· Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers.· Use clean, non-sparking tools to collect absorbed material.Large Spill· Dike far ahead of liquid spill for later disposal.· Water spray may reduce vapor, but may not prevent ignition in closed spaces.
応急処置EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.SKIN: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.INHALATION: IMMEDIATELY leave the contaminated areatake deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be usedif not available, use a level of protection greater than or equal to that advised under Protective Clothing.INGESTION: DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)General First Aid:· Call 911 or emergency medical service.· Ensure that medical personnel are aware of the material(s) involved, take precautions to protect themselves and avoid contamination.· Move victim to fresh air if it can be done safely.· Administer oxygen if breathing is difficult.· If victim is not breathing:-- DO NOT perform mouth-to-mouth resuscitationthe victim may have ingested or inhaled the substance.-- If equipped and pulse detected, wash face and mouth, then give artificial respiration using a proper respiratory medical device (bag-valve mask, pocket mask equipped with a one-way valve or other device).-- If no pulse detected or no respiratory medical device available, provide continuous compressions. Conduct a pulse check every two minutes or monitor for any signs of spontaneous respirations.· Remove and isolate contaminated clothing and shoes.· For minor skin contact, avoid spreading material on unaffected skin.· In case of contact with substance, remove immediately by flushing skin or eyes with running water for at least 20 minutes.· For severe burns, immediate medical attention is required.· Effects of exposure (inhalation, ingestion, or skin contact) to substance may be delayed.· Keep victim calm and warm.· Keep victim under observation.· For further assistance, contact your local Poison Control Center.· Note: Basic Life Support (BLS) and Advanced Life Support (ALS) should be done by trained professionals.Specific First Aid:· Wash skin with soap and water.(General first aid procedures)Eye: Irrigate immediately - If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.Skin: Water flush promptly - If this chemical contacts the skin, flush the contaminated skin with water promptly. If this chemical penetrates the clothing, immediately remove the clothing and flush the skin with water promptly. If irritation persists after washing, get medical attention.Breathing: Respiratory supportSwallow: Medical attention immediately - If this chemical has been swallowed, get medical attention immediately.
安全保管Fireproof. Separated from strong oxidants. Provision to contain effluent from fire extinguishing. Store in an area without drain or sewer access.
Firefighting HazardsVapors are heavier than air and may travel to a source of ignition and flash back. Liquid floats on water and may travel to a source of ignition and spread fire.
暴露管理・個人防護· Wear positive pressure self-contained breathing apparatus (SCBA).· Structural firefighters' protective clothing provides thermal protection but only limited chemical protection.Biological Exposure Indices (BEI) [ACGIH] - Sum of Mandelic and Phenylglyoxylic acids in urine = 150 mg/g creatinine at end of shiftNs (Nonspecific determinants--also present after exposure to styrene) [TLVs and BEIs]1430.0 [ppm]20.0 [ppm]
消火手順Suitable extinguishing media: Use water spray, alcohol-resistant foam, dry chemical, or carbon dioxide.Advice for firefighters: Wear self-contained breathing apparatus for firefighting if necessary.Use water spray to cool unopened containers.Approach fire from upwind to avoid hazardous vapors and toxic decomposition products. Use water spray, dry chemical, foam, or carbon dioxide. Use water spray to keep fire-exposed containers cool.
保管条件Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Hygroscopic. Storage class (TRGS 510): Flammable liquids.Outside or detached storage is preferred. Inside storage should be in a standard flammable liquids storage warehouse, room, or cabinet. Separate from oxidizing materials.Temp: ambientVenting: open (flame arrester) or pressure-vacuum
清掃方法ACCIDENTAL RELEASE MEASURES: Personal precautions, protective equipment and emergency procedures: Use personal protective equipment. Avoid breathing vapors, mist or gas. Ensure adequate ventilation. Remove all sources of ignition. Evacuate personnel to safe areas. Beware of vapors accumulating to form explosive concentrations. Vapors can accumulate in low areas. Environmental precautions: Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided. Methods and materials for containment and cleaning up: Contain spillage, soak up with non-combustible absorbent material, (e.g. sand, earth, diatomaceous earth, vermiculite) and transfer to a container for disposal according to local/national regulations.1) Remove all ignition sources. 2) Ventilate area of spill or leak. 3) For small quantities, absorb on paper towels. Evaporate in safe place (such as fume hood). ... Burn paper in suitable location away from combustible materials. Large quantities can be collected & atomized in suitable combustion chamber.Land spills should be containedskimming equipment and/or sorbent (polyurethane) foams can be used. Use of activated carbon is recommended.Water spills should be containedskimming equipment and/or sorbent (polyurethane) foams can be used to remove the slick. Universal gelling agent can be used to solidify a trapped mass. Use of activated carbon on dissolved portion is recommended.Absorb in vermiculite, dry sand, earth or similar material
非火災時の漏出対応Excerpt from ERG Guide 130 [Flammable Liquids (Water-Immiscible / Noxious)]:ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. A vapor-suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean, non-sparking tools to collect absorbed material.LARGE SPILL: Dike far ahead of liquid spill for later disposal. Water spray may reduce vapor, but may not prevent ignition in closed spaces. (ERG, 2024)
処分方法Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste number F003, must conform with USEPA regulations in storage, transportation, treatment and disposal of waste.SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal. If it is not practicable to manage the chemical in this fashion, it must be evaluated in accordance with EPA 40 CFR Part 261, specifically Subpart B, in order to determine the appropriate local, state and federal requirements for disposal.Product: Burn in a chemical incinerator equipped with an afterburner and scrubber but exert extra care in igniting as this material is highly flammable. Offer surplus and non-recyclable solutions to a licensed disposal company. Contact a licensed professional waste disposal service to dispose of this materialContaminated packaging: Dispose of as unused product.For more Disposal Methods (Complete) data for ETHYLBENZENE (9 total), please visit the HSDB record page.
毒性学的情報CDC-ATSDR Toxicological Profile
体内負荷Ethylbenzene was detected, not quantified, in 8 of 8 samples of mother's milk from 4 US urban areas(1). 16.5% of 387 expired air samples taken from 54 normal, healthy, urban volunteers were positive for ethylbenzene concentration with an average of 1.8 ng/L expired air(2). Whole blood samples from 250 subjects ranged in ethylbenzene concentrations from not detected to 59 ppb, with an average of 1.0 ppb(3). Blood samples from 251 humans in the US, collected as part of the 1999-2000 National Health and Nutrition Examination Survey, contained mean, median, minimum and maxium ethylbenzene concentrations of 0.073, 0.042, 0.010 and 0.949 ng/mL(4).
TreatmentFollowing oral exposure, a gastric lavage is recommended. Protect airway by placement in Trendelenburg and left lateral decubitus position or by endotracheal intubation. Control any seizures first. Following inhalation, move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Following eye exposure, irrigate exposed eyes with copious amounts of room temperature water for at least 15 minutes. In case of dermal exposure, remove contaminated clothing and wash exposed area thoroughly with soap and water. Treat dermal irritation or burns with standard topical therapy. Patients developing dermal hypersensitivity reactions may require treatment with systemic or topical corticosteroids or antihistamines. Some chemicals can produce systemic poisoning by absorption through intact skin. Carefully observe patients with dermal exposure for the development of any systemic signs or symptoms and administer symptomatic treatment as necessary. (T36)
相互作用Urinary biomarkers are widely used among biomonitoring studies because of their ease of collection and nonintrusiveness. Chloroform and TEX (i.e., toluene, ethylbenzene, and m-xylene) are chemicals that are often found together because of common use. Although interactions occurring among TEX are well-known, no information exists on possible kinetic interactions between these chemicals and chloroform at the level of parent compound or urinary biomarkers. The objective of this study was therefore to study the possible interactions between these compounds in human volunteers with special emphasis on the potential impact on urinary biomarkers. Five male volunteers were exposed by inhalation for 6 hr to single, binary, and quaternary mixtures that included chloroform. Exhaled air and blood samples were collected and analyzed for parent compound concentrations. Urinary biomarkers (o-cresol, mandelic, and m-methylhippuric acids) were quantified in urine samples. Published PBPK model for chloroform was used, and a Vmax of 3.4 mg/hr/kg was optimized to provide a better fit with blood data. Adapted PBPK models from our previous study were used for parent compounds and urinary biomarkers for TEX. Binary exposures with chloroform resulted in no significant interactions. Experimental data for quaternary mixture exposures were well predicted by PBPK models using published description of competitive inhibition among TEX components. However, no significant interactions were observed at levels used in this study. PBPK models for urinary biomarkers proved to be a good tool in quantifying exposure to VOC.In lab assistants using xylenes & ethylbenzene, 2,4-dimethylphenol, metab of m-xylene could not be detected. Competitive reaction between xylenes & ethylbenzene prevented m-xylene from oxidation. ...A study of workers exposed occupationally to solvent mixtures that include ethylbenzene (mean exposure level 1.8 ppm) showed a 58% incidence of hearing loss compared to 36% in the reference (unexposed) group. The role of ethylbenzene in the observed losses cannot be ascertained from this study given that ethylbenzene was only one of several solvents, most of which were present at mean concentrations 1.5- 3.5 times higher than ethylbenzene. Consistent with the outcome of occupational studies showing hearing loss, significant and persistent adverse auditory effects have been shown in animals after acute- and intermediate-duration inhalation exposures to ethylbenzene and after acute-duration oral exposures.
標的器官Developmental (effects during periods when organs are developing) , Hepatic (Liver), Neurological (Nervous System), Renal (Urinary System or Kidneys)Eyes, skin, respiratory system, central nervous system
健康影響Chronic exposure to etylbenzene can lead to an increase in the mean number of lymphocytes and a decrease in hemoglobin levels. Acute duration and intermediate duration studies suggest that the auditory system is a sensitive target of ethylbenzene toxicity. Exposure ethylbenzene can lead to functional and organic disturbances (nervous system disturbances, toxic hepatitis and upper respiratory tract complaints). Metabolites of ethylbenzene have been shown to produce oxidative damage to DNA. (L311, T52)
生態毒性値LC50Species: Chironomus plumosus (Midge) 2nd instar larvaConditions: freshwater, renewal, 23 °C, pH 7.0, dissolved oxygen 6.4 mg/LConcentration: 98300 ug/L for 24 hr (95% confidence interval: 67700-253200 ug/L)Concentration: 37800 ug/L for 48 hr (95% confidence interval: 31100-46500 ug/L)Species: Lepomis macrochirus /bluegill/Concentration: 32 mg/L for 96 hr /Conditions of bioassay not specified/Species: Carassius auratus /goldfish/Concentration: 94.44 mg/L for 96 hr /Conditions of bioassay not specified/For more Ecotoxicity Values (Complete) data for ETHYLBENZENE (15 total), please visit the HSDB record page.
環境中動態TERRESTRIAL FATE: Based on a classification scheme(1), measured Koc values of 224 to 257(2-4), indicate that ethylbenzene is expected to have moderate mobility in soil(SRC). Volatilization of ethylbenzene from moist soil surfaces is expected to be an important fate process(SRC) given a Henry's Law constant of 7.88X10-3 atm-cu m/mole(5). Ethylbenzene is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 9.6 mm Hg at 25 °C(6). Based on results of biodegradation screening studies, ethylbenzene is considered to be inherently biodegradable in soil under aerobic conditions, and not rapidly biodegradable in anaerobic conditions(7). As an example, ethylbenzene, present at 50 mg/L, reached 81% of its theoretical BOD in 14 days during a 28-day BOD test indicating it may be readily biodegradable under the right conditions(7). The kinetics of biodegradation appear to be site specific, and depend upon factors such as the type and population of microbes present, the environmental temperature, the concentration of ethylbenzene, the presence of other compounds that may act as a substrate, and the amount of oxygen and electron acceptors present(3).AQUATIC FATE: Based on a classification scheme(1), measured Koc values of 224 to 257(2-4, indicate that ethylbenzene is not expected to adsorb to suspended solids and sediment(SRC). One sediment study concluded that the marine sediment compartment is not an important sink for ethylbenzene(5). Volatilization from water surfaces is expected(6) based upon a Henry's Law constant of 7.88X10-3 atm-cu m/mole(7). Using this Henry's Law constant and an estimation method(5), volatilization half-lives for a model river and model lake are 3.1 hours and 4.1 days, respectively(SRC). According to a classification scheme(8), experimental BCF values of 15(9) and 1(10) suggests the potential for bioconcentration in aquatic organisms is low. Based on results of biodegradation screening studies, ethylbenzene is considered to be inherently biodegradable in water under aerobic conditions, and not rapidly biodegradable in anaerobic conditions(11). The kinetics of biodegradation appear to be site specific, and depend upon factors such as the type and population of microbes present, the environmental temperature, the concentration of ethylbenzene, the presence of other compounds that may act as a substrate, and the amount of oxygen and electron acceptors present(3). In a mesocosm experiment using simulated Narragansett Bay conditions, complete biodegradation occurred in approximately 2 days after a 2 week lag in spring and a 2 day lag in summer(12). As a component of gas oil, ethylbenzene completely degraded in groundwater in 8 days(13) and in seawater in 10 days(14). Phootooxidation of ethylbenzene may have some environmental importance in surface waters exposed to sunlight(3).ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), ethylbenzene, which has a vapor pressure of 9.6 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase ethylbenzene is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC)the half-life for this reaction in air is estimated to be 2.3 days(SRC), calculated from its rate constant of 7.0X10-12 cu cm/molecule-sec at 25 °C(3). Vapor-phase ethylbenzene is also degraded in the atmosphere by reaction with night-time nitrate radicals(SRC)the half-life for this reaction in air is estimated to be 56 days(SRC), calculated from its rate constant of 5.71X10-16 cu cm/molecule-sec at 25 °C(4). Ethylbenzene has been detected in rainwater and snow(5,6), and therefore, it may be removed from the air by wet deposition(SRC). Ethylbenzene does not absorb at wavelengths >290 nm(7) and, therefore, is not expected to be susceptible to direct photolysis by sunlight(SRC).
食品調査値Ethylbenzene concentrations in supermarket eggs packed in polystyrene, fresh unpacked eggs, and fresh eggs packed in polystyrene were found to be 28, 4, and 4 ng/g, respectively(1). Duck meat, duck fat, cantonese style roasted duck, and cantonese style roasted duck gravy had concentrations of 0.47, 2.55, 4.07, and 12.30 ppb ethylbenzene, respectively(2). Ethylbenzene was detected but not quantified in mountain Beaufort cheese(3). Ethylbenzene was detected in dried legumes such as beans with a 5 ppb average concentration, in split peas at 13 ppb, and in lentils at a 5 ppb concentration(4).As part of the US FDA Total Diet Program, monitoring of 70 foods between 1996 and 2000 detected ethylbenzene in the following food items(1):[Table#254]
有害作用Neurotoxin - Acute solvent syndromeOccupational hepatotoxin - Secondary hepatotoxins: the potential for toxic effect in the occupational setting is based on cases of poisoning by human ingestion or animal experimentation.Dermatotoxin - Skin burns.Lacrimator (Lachrymator) - A substance that irritates the eyes and induces the flow of tears.IARC Carcinogen - Class 3: Chemicals are not classifiable by the International Agency for Research on Cancer.ACGIH Carcinogen - Confirmed Animal.
暴露経路The substance can be absorbed into the body by inhalation of its vapour and by ingestion.inhalation, ingestion, skin and/or eye contactOral (L311)inhalation (L311)dermal (L311).
Milk ConcentrationsEthylbenzene was detected, but not quantified, in 8 of 8 samples of mother's milk from 4 US urban areas(1). The average concentration of ethylbenzene in processed cow's milk was found to be 0.13 ng/mL in whole milk, 0.05 ng/mL in 2% milk and 0.13 ng/mL in 1% milk(2).
RCRA 要件F003When ethylbenzene is a spent solvent, it is classified as a hazardous waste from a nonspecific source (F003), as stated in 40 CFR 261.31, and must be managed according to State and/or Federal hazardous waste regulations.
TSCA 要件Pursuant to section 8(d) of TSCA, EPA promulgated a model Health and Safety Data Reporting Rule. The section 8(d) model rule requires manufacturers, importers, and processors of listed chemical substances and mixtures to submit to EPA copies and lists of unpublished health and safety studies. Ethylbenzene is included on this list. Effective date: 6/19/87Sunset date: 6/19/97.
大気基準This action promulgates standards of performance for equipment leaks of Volatile Organic Compounds (VOC) in the Synthetic Organic Chemical Manufacturing Industry (SOCMI). The intended effect of these standards is to require all newly constructed, modified, and reconstructed SOCMI process units to use the best demonstrated system of continuous emission reduction for equipment leaks of VOC, considering costs, non air quality health and environmental impact and energy requirements. Ethylbenzene is produced, as an intermediate or a final product, by process units covered under this subpart.Listed as a hazardous air pollutant (HAP) generally known or suspected to cause serious health problems. The Clean Air Act, as amended in 1990, directs EPA to set standards requiring major sources to sharply reduce routine emissions of toxic pollutants. EPA is required to establish and phase in specific performance based standards for all air emission sources that emit one or more of the listed pollutants. Ethylbenzene is included on this list.
CERCLA 報告数量Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 1000 lb or 454 kg. The toll free number of the NRC is (800) 424-8802. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b).
清浄水法要件Toxic pollutant designated pursuant to section 307(a)(1) of the Federal Water Pollution Control Act and is subject to effluent limitations.Ethylbenzene is designated as a hazardous substance under section 311(b)(2)(A) of the Federal Water Pollution Control Act and further regulated by the Clean Water Act Amendments of 1977 and 1978. These regulations apply to discharges of this substance. This designation includes any isomers and hydrates, as well as any solutions and mixtures containing this substance.For the protection of human health from the toxic properties of ethylbenzene ... the ambient water criterion is determined to be 1.4 mg/L.
State Drinking Water Standards(CA) CALIFORNIA 300 ug/L
州飲料水ガイドライン(AZ) ARIZONA 680 ug/L(FL) FLORIDA 30 ug/L(ME) MAINE 70 ug/L(MN) MINNESOTA 700 ug/L
Federal Drinking Water StandardsMaximum contaminant levels (MCL) for organic contaminants apply to community and non-transient, non-community water systems: Ethylbenzene, MCL 0.7 mg/L.EPA 700 ug/L
連邦飲料水ガイドラインEPA 700 ug/L
F10
職業暴露区分（OEB）A
職業暴露限界（OEL）TWA: 100 ppm (435 mg/m3), STEL: 125 ppm (545 mg/m3)
水環境危害等級（WGK）1
生命健康即時危険濃度800 ppm [10% LEL]
TSCA 収載状態TSCA listed
RTECS 番号KI5775000
輸送番号（UN）UN 1175
毒性LD50 orally in rats: 5.46 g/kg (Smyth)
PRTR法第一種指定化学物質
税関コード2902 60 00
危険文句（R）63-11-20/22-36/38-40-48/20-65-20-48/20/22-38-22-39/23/24/25-23/24/25-2017/11/20
化審法(3)-28, (3)-60 優先評価化学物質
安衛法特化則 特定化学物質(特別有機溶剤等)
消防法危険物第4類第二石油類(非水溶性)
危険表示F+,Xn,Xi,F,T
安全措置（S）9-16-29-33-24/25-36/37-36-45-36/37/39-26-23-53-7-24-62
危険等級3Acute Tox. 3 InhalationAcute Tox. 4 OralCarc. 2Eye Irrit. 2Repr. 2Skin Irrit. 2STOT RE 1 OralSTOT SE 3
包装等級II
特定化学物質特38-318
自然発火温度810 °F
環境リスク評価エチルベンゼン(100-41-4)
貯蔵分類6.1C - Combustible acute toxic Cat.3toxic compounds or compounds which causing chronic effects
有害物質データ100-41-4(Hazardous Substances Data)