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HCID 6343Erstellt: 27. Oktober 2026

Ethanthiol

ETHYL MERCAPTAN · C2H5SH · Ethanthiol · Thioethanol · MERCAPTAN C2 · 1-ETHANETHIOL · Ethylmerkaptan · EM RT

https://huagongshe.com/de/chemical/6343

Molekülstruktur von Ethanthiol

Identifikatoren & physikalische Daten

CAS No.75-08-1
SummenformelC2H6S
Durchschnittliche Molmasse62,14 g/mol
Monoisotopische Masse62,01902119 g/mol
SMILESCCS
InChIKeyDNJIEGIFACGWOD-UHFFFAOYSA-N
PubChem CID6343
ChEBICHEBI:46511
EC No.200-837-3
DTXSIDDTXSID9026394
Lokaler NameEthanthiol

Chemische & physikalische Eigenschaften

XLogP0,9
Polarare Oberfläche (TPSA)1
H-Brücken-Donoren1
H-Brücken-Akzeptoren1
Frei drehbare Bindungen0
Schwere Atome3
Formalladung0
Komplexität2,8
StoffklassenOther Classes -> ThiolsFlammable agents - 4th degree
SpringerMaterials PropertiesSchoenflies notation
PestizideRodenticidesActive substance -> EU Pesticides database: Not approved
LogP (Verteilungskoeffizient)1.5
GeruchLeek-like odorPenetrating garlic-like odorStrong, skunk-like odor.
LebensmittelzusatzstoffeFLAVORING AGENT OR ADJUVANT -> FDA Substance added to food
Dichte0.826 at 68 °F (USCG, 1999) - Less dense than waterwill float0.8315 at 25 °C/4 °CRelative density (water = 1): 0.8390.833-0.8390.8315 @25 °C0.839 g/mL at 25 °C(lit.)
AromastoffeEU Flavoring substances
Viscosity0.003155 g/cm sec at 20 °C
Color/FormColorless liquid [Note: A gas above 95 degrees F].
Löslichkeit0.7 % (NIOSH, 2024)Soluble in alcohol, ether, petroleum naphthaSoluble in acetone, dilute alkaliIn water, 15,603 mg/L at 25 °CSolubility in water, g/100ml at 20 °C: 0.68Slightly soluble in waterSoluble in Ether, Alcohol, AcetoneSlightly miscible with water.
Flammpunktless than 0 °F (USCG, 1999)-48.3 C-48.3 °C (Closed cup)-54 °C (Closed cup)-55 °F1 °F
Schmelzpunkt-148 °C
Siedepunkt35 °C(lit.)
Dampfdichte2.1 (vs air)
Dampfdruck8.51 psi ( 20 °C)
Brechungsindexn20/D 1.4306(lit.)
FEMA4258 | ETHANETHIOL
LagerbedingungenStore below +30°C.
AggregatzustandLiquid
pKa (Säurekonstante)10.6(at 25℃)
FarbeColorless
GeruchStrong chunkoffensive garlic.
Biologische Quellesynthetic
Explosionsgrenze2.8-18%(V)
Geruchsschwelle0.0000087ppm
Spezifische WärmekapazitätCp(liquid): 1.9 J/(g·K)Cp(gas): 1.17 J/(g·K), at 25℃
JECFA Number1659
Merck14,3726
BRN773638
Henry-Konstante3.57(x 10-3 atmm3/mol) at 25 °C (Przyjazny et al., 1983)
Dielektrizitätskonstante6.9(14℃)
StabilitätStable. Extremely flammable - note low flash point. Incompatible with oxidizing agents, strong acids. May form explosive mixtures with air.
Hauptanwendungencleaning productscosmeticsflavors and fragrancesfood and beveragespersonal care
InChI1S/C2H6S/c1-2-3/h3H,2H2,1H3
InChIKeyDNJIEGIFACGWOD-UHFFFAOYSA-N
SMILESCCS
LogP (Verteilungskoeffizient)1.44
CAS Datenbank75-08-1(CAS DataBase Reference)
NIST chemische InformationenEthanethiol(75-08-1)
EPA chemische InformationenEthyl mercaptan (75-08-1)

Sicherheit & Vorschriften

GHS-EinstufungDangerH224: Extremely flammable liquid and vapor [Danger Flammable liquids]P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P273, P280, P301+P317, P303+P361+P353, P304+P340, P316, P321, P330, P370+P378, P391, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)H225 (93.1%): Highly Flammable liquid and vapor [Danger Flammable liquids]P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P273, P280, P301+P317, P303+P361+P353, P304+P340, P317, P330, P370+P378, P391, P403+P235, and P501 (click each P-code to see the statement)
Regulatorische InformationenChemical: EthanethiolCommission Regulation (EC) No 1565/2000 (Repealed by Com. Implementing Reg. (EU) No 872/2012)Ethanethiol is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Ethanethiol 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: 16-02-2018 https://echa.europa.eu/registration-dossier/-/registered-dossier/2123Ethanethiol: HSNO Approval: HSR001043 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.)
DOT-KennzeichnungFlammable Liquid
BrandgefahrenSpecial Hazards of Combustion Products: Irritating fumes of sulfur dioxide are generated.· HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.Extremely flammable. Gives off irritating or toxic fumes (or gases) in a fire. Vapour/air mixtures are explosive.
BrandpotenzialDangerous, when exposed to heat or flame or oxidizers.Minimum ignition temperature in air: 299 °Cin oxygen: 261 °CCan react vigorously with oxidizing materials.Extremely flammable.
GesundheitsgefahrenInhalation of vapor causes muscular weakness, convulsions, respiratory paralysis. High concentrations may cause pulmonary irritation. Liquid irritates eyes and skin. Ingestion causes nausea and irritation of mouth and stomach. (USCG, 1999)

Anwendungen & Verwendung

Beschreibung

Ethane thiol, commonly known as ethyl mercaptan, is a colorless gas or clear liquid with a distinct odor. It is an organosulfur compound with the formula CH3CH2SH. Abbreviated EtSH, it consists of an ethyl group (Et), CH3CH2, attached to a thiol group, SH. Its structure parallels that of ethanol, but with S instead of O. The odor of EtSH is infamous. Ethanethiol is more volatile than ethanol due to a diminished ability to engage in hydrogen bonding. Ethanethiol is toxic. It occurs naturally as a minor component of petroleum, and may be added to other wise odorless gaseous products such as liquefied petroleum gas (LPG) to help warn of gas leaks. At these concentrations, ethanethiol is not harmful.

Verwenden

Ethanethiol is used as an intermediate inthe manufacture of insecticides, plastics, andantioxidants; and as an additive to natural gasto give odor. It occurs in illuminating gas andin petroleum distillates.

Herstellung & Synthese

synthetische

Ethanethiol is prepared by the reaction of ethylene with hydrogen sulfide over a catalyst. The various producers utilize different catalysts in this process. It is also be prepared commercially by the reaction of ethanol with hydrogen sulfide gas over an acidic solid catalyst, such as alumina. Ethanethiol was originally reported by Zeiss in 1834 . Zeise treated calcium ethyl sulfate with a suspension of barium sulfide saturated with hydrogen sulfide. He is credited with naming the C2H5S- group as mercaptum. Ethanethiol can also be prepared by a halide displacement reaction, where ethyl halide is reacted with aqueous sodium bisulfide. This conversion was demonstrated as early as 1840 by Henri Victor Regnault.

· May cause toxic effects if inhaled or absorbed through skin.
GefahrenübersichtIts toxicity in rats and mice is similar to that of butyl mercaptan. Acutely, it is about 1/5 as toxic as hydrogen sulfide. Human volunteers exposed to 1mg/m3 (0.5 ppm) experienced no symptoms, while those exposed to 10 mg/m3 (4 ppm) complained of mucous membrane irritation and fatigue. [ACGIH] Liver necrosis occurs in animals receiving sublethal doses. [HSDB] See THIOLS.
DOT-Nummer und Handbuch2363 129
Reaktive GruppeSulfides, Organic
EG-EinstufungSymbol: F, Xn, NR: 11-20-50/53S: (2)-16-25-60-61
UN-EinstufungUN Hazard Class: 3UN Pack Group: I
Reactivity AlertsHighly Flammable
OSHA StandardsPermissible Exposure Limit: Table Z-1 Ceiling value: 10 ppm (25 mg/cu m).Vacated 1989 OSHA PEL TWA 0.5 ppm (1 mg/cu m) is still enforced in some states.
BrandbekämpfungExcerpt from ERG Guide 129 [Flammable Liquids (Water-Miscible / Noxious)]:Use powder, foam, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.
Erste-Hilfe-MaßnahmenFresh air, rest. Artificial respiration may be needed. Refer for medical attention.Rinse skin with plenty of water or shower. Rinse skin with plenty of water or shower.First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.Rinse mouth. Rinse mouth. Give one or two glasses of water to drink. Do NOT induce vomiting. Refer for medical attention .
Freisetungsmaßnahmen· 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.· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.
Erste HilfeExcerpt from NIOSH Pocket Guide for Ethyl mercaptan:General First Aid:(General first aid procedures)
Sichere LagerungFireproof. Separated from strong oxidants and strong acids. Cool.
Firefighting HazardsVapor is heavier than air and may travel long distance to a source of ignition and flash backcontainers may explode in a fire.
Expositionsschutz und Persönliche Schutzausrüstung· Wear positive pressure self-contained breathing apparatus (SCBA).0.5 [ppm]
BrandbekämpfungsverfahrenIf material /is/ on fire or involved in /a/ fire: Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may spread fire. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use foam, dry chemical, or carbon dioxide.Evacuation: If fire becomes uncontrollable or container is exposed to direct flame-consider evacuation of one-third (1/3) mile radius. If material leaking (not on fire) consider evacuation from downwind area based on amount of material spilled, location and weather conditions.
LagerbedingungenFireproof. Separated from strong oxidants, strong acids. Cool.Materials which are toxic as stored or which can decomp into toxic components ... should be stored in cool, well-ventilated place, out of the direct rays of the sun, away from areas of high fire Hazard, and should be periodically inspected. Incompatible materials should be isolated ... .Keep tightly closed and in a cool place.
ReinigungsverfahrenOdorous gases, such as methylmercaptans, mainly present a cosmetic problem. Thus a variety of methods and procedures, and also patents, are available with methods to absorb odors in scrubbers, by use of catalytic oxidizers or combined scrubber systems with oxidizing agents such as ozone or peroxides.Odors can be removed from circulating air with charcoal, by catalytic oxidation, or by destruction with a UV scrubber.If ethyl mercaptan is spilled or leaked, the following steps should be taken: 1. Remove all ignition sources. 2. Ventilate area of spill or leak. 3. For small quantities of liquids contaning ethyl mercaptan, absorb on paper towels and place in an appropriate container. Place towels in a safe place such as a fume hood for evaporation. Allow sufficient time for evaporation of the vapors so that the the hood ductwork is free from ethyl mercaptan vapors. Burn the paper in a suitable location away from combustible materials. 4. Large quantities of liquids containing ethyl mercaptan may be absorbed in vermiculite, dry sand, earth, or a similar material and placed in an appropriate container. Ethyl mercaptan should not be allowed to enter a confined space such as a sewer because of the possibility of an explosion. 5. Liquids containing ethyl mercaptan may be collected by vacuuming with an appropriate system. If a vacuum system is used, there should be no sources of ignition in the vicinity of the spill, and flashback prevention devices should be provided.Evacuate danger area! Collect leaking liquid in sealable containers. Do NOT wash away into sewer. Personal protection: self-contained breathing apparatus.
Freisetung ohne BrandExcerpt from ERG Guide 129 [Flammable Liquids (Water-Miscible / Noxious)]:
EntsorgungsverfahrenSRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air qualitypotential migration in soil or watereffects on animal, aquatic, and plant lifeand conformance with environmental and public health regulations.Ethyl mercaptan is a waste chemical stream constituent which may be subjected to ultimate disposal by controlled incineration (2,000 °F) followed by scrubbing with a caustic solution.Incineration ... : Incinerate scrap material under controlled conditions using afterburner and a scrubber to neutralize sulfur dioxide ... .
KörperbelastungSmall amounts of ethyl mercaptan are components of human breath(1).
Wechselwirkungen... It supplements the effect of UV light on the epidermis by increasing the skin's histidase activity.
ZielorganeEyes, respiratory system, liver, kidneys, blood
ÖkotoxizitätswerteEC50 Daphnia magna (Waterflea, <24 hr old) 90-280 mg/L/48 hrstatic, 20 °C, hardness: 250 mg/L CaCO3, dissolved oxygen: >6.5 mg/L, pH 8.2LC50 Daphnia magna (Water flea) 170 ug/L/48 hrstatic /formulated product/
UmweltverhaltenTERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 22(SRC), determined from a water solubility of 1.56X10+4 mg/L(2) and a regression-derived equation(3), indicates that ethyl mercaptan is expected to have very high mobility in soil(SRC). Volatilization of ethyl mercaptan from moist soil surfaces is expected to be an important fate process(SRC) given a Henry's Law constant of 4.53X10-3 atm-cu m/mole(4). Ethyl mercaptan is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 529 mm Hg(5). Biodegradation data were not available(SRC, 2005).AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 22(SRC), determined from a water solubility of 1.56X10+4 mg/L(2) and a regression-derived equation(3), indicates that ethyl mercaptan is not expected to adsorb to suspended solids and sediment(SRC). Volatilization from water surfaces is expected(3) based upon a Henry's Law constant of 4.53X10-3 atm-cu m/mole(4). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 2.4 hours and 3.2 days, respectively(SRC). According to a classification scheme(5), an estimated BCF of 2.7(SRC), from its water solubility(2) and a regression-derived equation(3), suggests the potential for bioconcentration in aquatic organisms is low(SRC). Biodegradation data were not available(SRC, 2005).ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), ethyl mercaptan, which has a vapor pressure of 529 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase ethyl mercaptan 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 10 hours(SRC), calculated from its rate constant of 4.68X10-11 cu cm/molecule-sec at 25 °C(3). Ethyl mercaptan does not absorb light at wavelengths >290 nm and therefore is not expected to be susceptible to direct photolysis by sunlight.
LebensmitteluntersuchungswerteEthyl mercaptan was qualitatively detected in the volatile components of raw chicken breast muscle(1). The compound has been identified as a beef volatile(2). Ethyl mercaptan occurs naturally in some vegetables such as cabbage(3).
Unerwünschte WirkungenOccupational hepatotoxin - Secondary hepatotoxins: the potential for toxic effect in the occupational setting is based on cases of poisoning by human ingestion or animal experimentation.
ExpositionspfadeThe substance can be absorbed into the body by inhalation and by ingestion.inhalation, ingestion, skin and/or eye contact
Signs and SymptomsDizziness. Headache. Nausea. Vomiting. Tremor. Weakness. Unconsciousness.Redness.Redness. Pain.See Inhalation.irritation mucous membraneheadache, nauseaIn Animals: incoordination, lassitude (weakness, exhaustion)liver, kidney damagecyanosisnarcosis
Effluent ConcentrationsEthyl mercaptan concentrations of 0.25-1.01 mg/L were detected in the effluent of the Barceloneta waste treatment facility in Puerto Rico in Sept 1981(1)the treatment facility receives mostly industrial waste(1). An ethyl mercaptan concentration of 3.8 ppm was detected in the headspace gas of a wastewater effluent from an unidentified oil refinery(2). An ethyl mercaptan concentration of 72.5 ppm was detected in the headspace gas of a wastewater effluent from an unidentified waste treatment plant(2). A concentration of 21,000 ppm volume was reported in a study measuring gaseous trace compounds from an unspecified municipal landfill site(3).
Medical SurveillancePrior to placing a worker in a job with a potential for exposure to ethyl mercaptan, the physician should evaluate and document the worker's baseline health status with thorough medical, environmental, and occupational histories, a physical examination, and physiologic and laboratory tests appropriate for the anticipated occupational risk. These should concentrate on the function and integrity of the nervous and respiratory systems. Medical surveillance for respiratory disease should be conducted by using the principles and methods recommended by NIOSH and the American Thoracic Society (ATS). A preplacement medical evaluation is recommended in order to detect and assess preexisting or concurrent conditions which may be aggravated or result in increased risk when a worker is exposed to n-butyl mercaptan at or below the NIOSH REL. The examining physician should consider the probable frequency, intensity, and duration of exposure, as well as the nature and degree of the condition, in placing such a worker. Such conditions, which should not be regarded as absolute contraindications to job placement, include chronic diseases of the respiratory system.
Soil Adsorption/MobilityThe Koc of ethyl mercaptan is estimated as 22(SRC), using a water solubility of 1.56X10+4 mg/L(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that ethyl mercaptan is expected to have very high mobility in soil.
DHS Chemicals of Interest (COI)Ethyl mercaptan110000Flammable chemical that can be released at a facility.
F13
Arbeitsplatzgrenzwert (OEL)Ceiling: 0.5 ppm (1.3 mg/m3) [15-minute]
Wassergefährdungsklasse (WGK)3
Sofort lebensgefährliche Konzentration500 ppm
TSCA-Inventar-StatusTSCA listed
UN-TransportnummerUN 2363
Zollcode2930 90 98
RTECS-Nr.KI9625000
R-Sätze (R)11-20-50/53-51/53-12-20/22
ToxizitätLD50 orally in Rabbit: 682 mg/kg
GefahrensymboleF,Xn,N,F+
Sicherheitshinweise (S)16-25-60-61
Gefahrenklasse3Acute Tox. 4 InhalationAcute Tox. 4 OralAquatic Acute 1Aquatic Chronic 1Flam. Liq. 1
VerpackungsgruppeI
Lagerklasse3 - Flammable liquids
Gefahrstoffdaten75-08-1(Hazardous Substances Data)
Selbstentzündungstemperatur570 °F