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HCID 7970作成日：2026年10月27日

3-ピコリン

3-ピコリン · β-ピコリン · 3-メチルピリジン · 3メチルピリジン · 3-ピコリン(β-〃) · Β‐ピコリン · 3-METHYLPYRIDINE · BETA-PICOLINE

https://huagongshe.com/ja/chemical/7970

3-ピコリン の分子構造式

識別子と物理属性

CAS No.108-99-6
分子式C6H7N
平均分子量93.13 g/mol
単同位体質量93.05784922 g/mol
SMILESCc1cccnc1
InChIKeyITQTTZVARXURQS-UHFFFAOYSA-N
PubChem CID7970
ChEMBLCHEMBL15722
ChEBICHEBI:39922
EC No.203-636-9
DTXSIDDTXSID9021897
現地名3-ピコリン

化学・物理的性質

XLogP1.2
極性表面積12.9
水素結合供与体数0
水素結合受容体数1
回転可能結合数0
重原子数7
形式電荷0
複雑度52.1
物質分類Nitrogen Compounds -> Pyridines
医薬品Pharmaceuticals -> Listed in ZINC15
SpringerMaterials PropertiesBoiling point
LogP（分配係数）log Kow = 1.20
臭いSweetish, not unpleasant odor不快
密度0.957 (USCG, 1999) - Less dense than waterwill float0.9566 at 20 °C/4 °CRelative density (water = 1): 0.960.9613 @ 20°C0.957 g/mL at 25 °C (lit.)
香味料EU Flavoring substances
Color/FormColorless liquid
溶解度Very soluble (NTP, 1992)Miscible with water at 20 °CMiscible with alcohol, etherVery soluble in acetonesoluble in carbon tetrachlorideSolubility in water: miscibleアルコール：混和性（点灯）溶ける
引火点97 °F (NTP, 1992)38 °C37 °C (99 °F) (Closed cup)38 °C c.c.
沸点290 to 291 °F at 760 mmHg (NTP, 1992)144.1 °C143-144 °C144.1 °C @760 [mm Hg]144 °C (lit.)
DecompositionWhen heated to decomposition it emits toxic fumes of /nitrogen oxides/.
融点-19 °C (lit.)
蒸気密度3.2 (vs air)
蒸気圧4.4 mm Hg ( 20 °C)
屈折率n20/D 1.504(lit.)
貯蔵条件Flammables area
pKa（酸解離定数）5.68(at 20℃)
外観・状態液体
色クリアイエロー
pH10 (100g/l, H2O, 20℃)
爆発限界1.3-8.7%(V)
比熱容量Cp(liquid): 1.7 J/(g·K), at 25℃
Merck14,7401
BRN1366
ヘンリー定数1.2×100 mol/(m3Pa) at 25℃, Brockbank (2013)
誘電率11.1
安定性安定。可燃性。吸湿性。酸化剤と相容れない。
InChI1S/C6H7N/c1-6-3-2-4-7-5-6/h2-5H,1H3
InChIKeyITQTTZVARXURQS-UHFFFAOYSA-N
SMILESCc1cccnc1
LogP（分配係数）1.2 at 20℃
CAS データベース108-99-6(CAS DataBase Reference)
NISTの化学物質情報Pyridine, 3-methyl-(108-99-6)
EPAの化学物質情報3-Methylpyridine (108-99-6)

化学的特性

colourless liquid

安全性と法規制

GHS 分類This chemical does not meet GHS hazard criteria for 2% (36 of 1774) of reports.DangerH226 (95.7%): Flammable liquid and vapor [Warning Flammable liquids]P210, P233, P240, P241, P242, P243, P260, P261, P262, P264, P264+P265, P270, P271, P280, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P303+P361+P353, P304+P340, P305+P351+P338, P305+P354+P338, P316, P317, P319, P321, P330, P337+P317, P361+P364, P363, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 1774 reports by companies from 21 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
規制情報Chemical: Pyridine, 3-methyl-Commission Regulation (EC) No 1565/2000 (Repealed by Com. Implementing Reg. (EU) No 872/2012)Pyridine, 3-methyl- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Pyridine, 3-methyl- 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: 11-12-2019 https://echa.europa.eu/registration-dossier/-/registered-dossier/21193-Methylpyridine: Does not have an individual approval but may be used under an appropriate group standard
輸送ラベル（DOT）Flammable Liquid
火災危険Special Hazards of Combustion Products: Vapors may travel considerable distance to a source of ignition and flashback. Forms explosive mixtures in air. Emits toxic fumes under fire conditions. (USCG, 1999)Flammable. Gives off irritating or toxic fumes (or gases) in a fire. Above 38 °C explosive vapour/air mixtures may be formed.
火災の可能性Moderate fire risk.Flammable when exposed to heat or flame.
健康有害性HARMFUL if swallowed, inhaled or absorbed through skin. Material is extremely destructive to tissue of the mucous membranes and upper respiratory tract, eyes and skin. Inhalation may be fatal as a result of spasm, inflammation of larynx and bronchi, chemical pneumonitis and pulmonary edema. Symptoms of exposure may include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea and vomiting. (USCG, 1999)
有害性の概要

用途

用途

医薬?農薬?有機ゴム薬品?界面活性剤の合成原料及び溶剤 (NITE CHRIP)

用途

有機合成原料(医薬品、農薬、ゴム薬品、界面活性剤）、溶剤。

天然物の起源

3-Methylpyridine is released during the production of fossil fuels. It is formed as a byproduct of coke production (Naizer and Mashek 1974); is present in coal gasification wastewater (Giabbai et al 1985); is a contaminant of groundwater near underground coal gasification sites (Stuermer and Morris 1982); is a component of groundwater contaminated with coal-tar waste (Pereira et al 1983); and is found in shale oil wastewaters (Hawthorne and Sievers 1984; Hawthorne et al 1985). It is formed upon pyrolysis of wood (Yasuhara and Sugiura 1987) and is a constituent of cigarette (IARC 1986; Sakuma et al 1984) and marijuana (Merli et al 1981) smoke. 3-Methylpyridine is formed during the thermal degradation of nicotine in the burning of tobacco (Schmelz et al 1979). The chemical is also present in brewed coffee (Sasaki et al 1987) and black tea (Werkoff and Hubert 1975). 3-Methylpyridine has been detected along with other micropollutants in the Barcelona water supply (Rivera et al 1987). Methods for the biological treatment of wastewater high in the chemical have been developed (Roubiskova 1986). The biodegradability of 3-methylpyridine has been studied in various soils (Sims and Sommers 1985, 1986).

使用

3-Picoline is used as a precursor in pharmaceuticals and agricultural industries. It acts as a precursor to 3-cyanopyridine, niacin, vitamin-B. It is an antidote for organophosphate poisoning.

一般的な説明

Colorless liquid with a sweetish odor .

製法・合成法

調製方法

There are three major methods of 3-methylpyridine manufacturing: (1) vaporphase reaction of acetaldehyde and ammonia with formaldehyde and/or methanol in the presence of an acidic catalyst (e.g. Si02A103); (2) extraction from bone oil; (3) dry distillation of bones or coal (Hawley 1977; Parmeggiani 1983).

純化方法

In general, the same methods of purification that are described for 2-methylpyridine can be used. However, 3-methylpyridine often contains 4-methylpyridine and 2,6-lutidine, neither of which can be removed satisfactorily by drying and fractionation, or by using the ZnCl2 complex. Biddiscombe and Handley [J Chem Soc 1957 1954], after steam distillation as for 2-methylpyridine, treated the residue with urea to remove 2,6-lutidine, then azeotropically distilled with acetic acid (the azeotrope had b 114.5o/712mm), and recovered the base by adding excess of aqueous 30% NaOH, drying with solid NaOH and carefully fractionally distilling. The distillate is then fractionally crystallised by slow partial freezing. An alternative treatment [Reithoff et al. Ind Eng Chem (Anal Edn) 18 458 1946] is to reflux the crude base (500mL) for 20-24hours with a mixture of acetic anhydride (125g) and phthalic anhydride (125g) followed by distillation until phthalic anhydride begins to pass over. The distillate is treated with NaOH (250g in 1.5L of water) and then steam distilled. Addition of solid NaOH (250g) to this distillate (ca 2L) led to the separation of 3-methylpyridine which is removed, dried (K2CO3, then BaO) and fractionally distilled. (Subsequent fractional freezing would probably be advantageous.) The hydrochloride has m 85o, and the picrate has m 153o(from Me2CO, EtOH or H2O). [Beilstein 20 III/IV 2710, 20/5 V 506.]

A corrosive substance that can cause injury to the skin, eyes, and respiratory tract
Inhalation of high concentrations can cause unconsciousness
The liquid defats the skin
[ICSC] A corrosive substance that can cause injury to the skin, eyes, and respiratory tract
May be absorbed through skin
Causes CNS depression in high-dose animal studies
[MSDSonline] An irritant that can cause CNS depression
In one case, a worker exposed for 11 years had elevated liver enzymes
Liver changes occur in rats exposed to chronic high doses
[AIHA]
反応性グループAmines, Phosphines, and Pyridines
UN 分類UN Hazard Class: 3UN Pack Group: III
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. 3-Methylpyridine is included on this list. Effective date: 09/10/84Sunset date: 09/10/94.
Reactivity AlertsHighly Flammable
Reactivity ProfileBETA-PICOLINE may react with oxidizing materials (NTP, 1992). Neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.
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. 3-Methylpyridine is produced, as an intermediate or a final product, by process units covered under this subpart.
消火Fires involving this material should be controlled using a dry chemical, carbon dioxide or Halon extinguisher. (NTP, 1992)Use water spray, powder, alcohol-resistant 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 skin with plenty of water or shower. Refer for medical attention .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 .
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.
安全保管Fireproof. Separated from strong oxidants.
Firefighting HazardsSpecial hazards arising from the substance or mixture: Carbon oxides, nitrogen oxides (NOx).
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.If material on fire or involved in fire: Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use "alcohol" foam, dry chemical, or carbon dioxide. /Picolines/
保管条件Conditions for safe storage, including any incompatibilities: 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.
清掃方法Accidental Release Measures. Personal precautions, protective equipment and emergency procedures: Wear respiratory protection. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Remove all sources of ignition. Evacuate personnel to safe areas. Beware of vapours accumulating to form explosive concentrations. Vapours can accumulate in low areas. Environmental precautions: Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Methods and materials for containment and cleaning up: Contain spillage, and then collect with an electrically protected vacuum cleaner or by wet-brushing and place in container for disposal according to local regulations.
非火災時の漏出対応SMALL SPILLS AND LEAKAGE: If you should spill this chemical, use absorbent paper to pick up all liquid spill material. Seal the absorbent paper, as well as any of your clothing which may be contaminated, in a vapor-tight plastic bag for eventual disposal. Wash any surfaces you may have contaminated with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
処分方法SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity 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 and plant lifeand conformance with environmental and public health regulations.Waste treatment methods. 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 material. Contaminated packaging: Dispose of as unused product.
漏出処分Personal protection: chemical protection suit including self-contained breathing apparatus. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.
Preventive MeasuresSRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.Precautions for safe handling: Avoid contact with skin and eyes. Avoid inhalation of vapour or mist. Keep away from sources of ignition - No smoking.Take measures to prevent the build up of electrostatic charge.Appropriate engineering controls: Avoid contact with skin, eyes and clothing. Wash hands before breaks and immediately after handling the product.Gloves must be inspected prior to use. Use proper glove removal technique (without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands.For more Preventive Measures (Complete) data for 3-METHYLPYRIDINE (6 total), please visit the HSDB record page.
相互作用The three IQ (2-amino-3-methylimidazo(4,5-f) quinoline) compounds IQ, MeIQx (2-amino-3,4-dimethyl (4,5-f) quinoxaline) and MeIQ (2-amino-3,4-dimethylimidazo(4,5-f)quinoline) have been found in boiled pork juice. To determine which Maillard reaction products are important in the formation of IQ-type mutagens in boiled pork juice, six Maillard reaction products were separately added to the porkjuice before reflux boiling and then the mutagenicity of each sample was examined with Salmonella typhimurium TA98 in the presence of S9 mix. The addition of four Maillard reaction products enhanced the mutagenicity of pork juice 1.2-2.9-fold after reflux boiling. The highest level of enhancement was observed with tetrahydrothiophene, followed by 2,3-dimethylpyrazine, 3-methylpyridine and 2-methylpyridine. However, the addition of 2-acetylpyrrole and imidazole greatly inhibited the mutagenicity of pork juice.3-Methylpyridine partially relieved the ataxia induced by tri-o-cresyl phosphate in hens.
生態毒性値LD50Species: Wild bird oral 1 g/kgLC50Species: Pimephales promelas (Fathead Minnow) age 29 days, length 18.1 mm, weight 0.077 gConditions: freshwater, flow through, 24.1 °C, pH 7.8, hardness 43.5 mg/L CaCO3, alkalinity 44.0 mg/L CaCO3, dissolved oxygen 7.2 mg/LConcentration: 144000 ug/L for 96 hr (95% confidence interval: 131000-160000 ug/L) /99% purity/
環境中動態TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 115(SRC), determined from a structure estimation method(2), indicates that 3-methylpyridine is expected to have high mobility in soil(SRC). The pKa of 3-methylpyridine is 5.63(3), indicating that this compound will exist partially in cation form in the environment and cations generally adsorb more strongly to soils containing organic carbon and clay than their neutral counterparts(4). Soil studies with 2-methylpyridine(5), a compound expected to have similar sorption properties as 3-methylpryidine(SRC), demonstrated that Koc can vary with pH with lowest adsorption occurring in the non-ionized form(5). Volatilization of 3-methylpyridine from moist soil surfaces is expected to be an important fate process(SRC) given a Henry's Law constant of 7.73X10-6 atm-cu m/mole(6). 2-Methylpyridine is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 6.05 mm Hg at 25 °C(7). 3-Methylpyridine is expected to biodegrade fairly rapidly in aerobic soilhowever, under anaerobic conditions, this compound may be persistent(8,9). 3-Methylpyridine was added to aerobic Fincastle silt loam for a period of 32 days69.3% of the available nitrogen was released after this time(8). However, in an aerobic surface soil experiment, only 35% biodegradation was reported in 3 months while in anaerobic surface soil, under denitrifying and sulfidogenic conditions, 50 and 10 to 20% of the initially added 3-methylpyridine was biodegraded, respectively, in 3 months(9).AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 115(SRC), determined from a structure estimation method(2), indicates that 3-methylpyridine 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 7.73X10-6 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 5 and 37 days, respectively(SRC). According to a classification scheme(5), an estimated BCF of 3(SRC), from its log Kow of 1.20(6) and a regression-derived equation(2), suggests the potential for bioconcentration in aquatic organisms is low(SRC). Low bioconcentration was reported for BCF tests using carp (Cyprinus carpio)(7). Rapid biodegradation under aerobic conditions is likely although 3-methylpyridine seems resistant to biodegradation under anaerobic conditions(8,9). 3-Methylpyridine was rapidly biodegraded in acclimated aerobic natural waters with complete removal within 2 to 4 days(8). However, in sulfidogenic estuarine sediments, 3-methylpyridine was not biodegraded over 200 days(9). 3-Methylpyridine is not expected to undergo hydrolysis in the environment due to the lack of functional groups that hydrolyze under environmental conditions(3). The UV absorption spectrum of 3-methylpyridine in aqueous solution shows no absorption >290 nm(10)therefore, 3-methylpyridine is not expected to be susceptible to direct photolysis by sunlight(SRC).ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), 2-methylpyridine, which has a vapor pressure of 6.05 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase 3-methylpyridine 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 7 days(SRC), calculated from its rate constant of 2.30X10-12 cu cm/molecule-sec at 25 °C(3). The UV absorption spectrum of 3-methylpyridine in aqueous solution shows no absorption >290 nm(4)
食品調査値Concentrations of 3-methylpyridine in 3 commercial fermented soybean curds from Hong Kong were 17.9, 21.0, and 54.6 ug/kg(1). 3-Methylpyridine was identified as a volatile component of boiled beef(2) and mutton(3).
有害作用Neurotoxin - Other CNS neurotoxin
暴露経路The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion.
毒性の概要IDENTIFICATION AND USE: 3-Methylpyridine is a colorless liquid. It is used as a solventintermediate in dye and resins industriesin manufacture of insecticides, waterproofing agents, niacin and niacinamide. HUMAN EXPOSURE AND TOXICITY: 3-Methylpyridine caused eye irritation, gastro-intestinal disturbances and central nervous system (CNS) effects in one worker and may have produced liver abnormalities and facial skin eruptions in another. ANIMAL STUDIES: 3-Methylpyridine was a marked skin irritant in rabbits and guinea-pigs and has caused severe eye irritation in rabbits.. It has affected electrophysiological parameters in rats. Moderate acute oral, dermal and inhalation toxicity was demonstrated in laboratory animals, the principal site of toxic attack being the CNS. Repeated inhalation exposure resulted in increased liver weight in rats. 3-Methylpyridine was tested in three independent bacterial gene mutation studiesall studies gave negative results in S. typhimurium or E. coli tester strains, with and without exogenous metabolic activation. In vivo, no significant increases in the frequencies of micronucleated erythrocytes were observed in peripheral blood of male or female mice. In NTP cancerogenicity studies there was equivocal evidence of carcinogenic activity of 3-methylpyridine in male mice based on increased incidences of alveolar/ bronchiolar adenoma and alveolar/bronchiolar adenoma or carcinoma (combined). There was clear evidence of carcinogenic activity of 3-methylpyridine in female mice based on the increased incidences of alveolar/ bronchiolar adenoma or carcinoma (combined) in the lung and of hepatocellular carcinoma and hepatoblastoma in the liver. In the similar studies in rats there was no evidence of carcinogenic activity of 3-methylpyridine in male rats. There was some evidence of carcinogenic activity of 3-methylpyridine in female rats based on increased incidences of alveolar/bronchiolar adenoma and alveolar/bronchiolar adenoma or carcinoma (combined).
Signs and SymptomsCough. Dizziness. Drowsiness. Headache. Nausea. Sore throat. Unconsciousness. Weakness.MAY BE ABSORBED! Dry skin. Redness. Burning sensation. Pain. Blisters. Further see Inhalation.Redness. Pain. Severe deep burns.Abdominal pain. Burning sensation. Diarrhoea. Further see Inhalation.
Ongoing Test StatusEPA has released the first beta version (version 0.5) of the Interactive Chemical Safety for Sustainability (iCSS) Dashboard. The beta version of the iCSS Dashboard provides an interactive tool to explore rapid, automated (or in vitro high-throughput) chemical screening data generated by the Toxicity Forecaster (ToxCast) project and the federal Toxicity Testing in the 21st century (Tox21) collaboration. /The title compound was tested by ToxCast and/or Tox21 assaysSee the data in Chemical Explorer/[USEPAICSS Dashboard ApplicationAvailable from, as of June 27, 2014: http://actor.epa.gov/dashboard/]The following link will take the user to the National Toxicology Program (NTP) Test Agent Search Results page, which tabulates all of the "Standard Toxicology & Carcinogenesis Studies", "Developmental Studies", and "Genetic Toxicity Studies" performed with this chemical. Clicking on the "Testing Status" link will take the user to the status (i.e., in review, in progress, in preparation, on test, completed, etc.) and results of all the studies that the NTP has done on this chemical.[Available from, as of October 22, 2014: http://ntp-apps.niehs.nih.gov/ntp_tox/index.cfm?fuseaction=ntpsearch.searchresults&searchterm=108-99-6]
Effluent ConcentrationsOil shale condensate retort water contained 3-methylpyridine at 6.5 mg/L(1).
Soil Adsorption/MobilityUsing a structure estimation method based on molecular connectivity indices(1), the Koc of 3-methylpyridine can be estimated to be 115(SRC). According to a classification scheme(2), this estimated Koc value suggests that 3-methylpyridine is expected to have high mobility in soil. The pKa of 3-methylpyridine is 5.63(3), indicating that this compound will exist partially in cation form in the environment and cations generally adsorb more strongly to soils containing organic carbon and clay than their neutral counterparts(4). Soil studies with 2-methylpyridine(5), a compound expected to have similar sorption properties as 3-methylpryidine(SRC), demonstrated that Koc can vary with pH with lowest adsorption occurring in the non-ionized form(5).
TSCA Test SubmissionsSubchronic inhalation toxicity was evaluated in groups of 10 male Crl:CD(SD)BR rats exposed to atmospheres containing 3-methylpyridine at an analytically measured (by gas chromatograph) level of 0 or 290q33 ppm for 6 h/d, 5 d/week for 2 weeks. The test atmosphere was generated by pumping liquid test material into a heated flask and diluting the resulting vapors with air introduced into the flask and chamber. There were no mortalities. Clinical observations included no compound-related signs of toxicity. Clinical chemistry and hematological studies revealed no treatment- related changes. Necropsy revealed elevated mean absolute and relative liver weights which was reversible after 13 days recovery. There were no other signs of toxicity.3-Methylpyridine (CAS # 108-99-6, 98%) was evaluated for mutagenicity in Chinese hamster V79 lung cells exposed to concentrations of 0, 3.25, 3.5, and 3.75 uL/mL/plate in triplicate cultures, at 3 uL/mL/plate in solitary culture, and 4 uL/mL/plate in duplicate, without rat liver S9 metabolic activation (due to negative results in Ames microsome test), each for 4 hours. Exposure levels were chosen to span cloning efficiencies ranging from 3.6 to 74.6% L/mL/plate in preliminary cytotoxicity assay, and treated cells were subcultured in nonselective and selective medium, respectively, to determine survival and mutagenicity. By study protocol, a reproducible dose-related response with a 10-fold increase in the mutation rate of controls at 1 or more doses constituted a biologically significant indication of mutagenicity. With correction for cell survival, no treatment-related increased mutation frequency was observed.3-Methylpyridine (CAS # 108-99-6, 98%) was evaluated for DNA single-strand breaks in Chinese hamster V79 lung cells exposed to concentrations of 0, 2, 3, 4, and 5 uL/mL/plate for 4 hours without metabolic activation (due to a negative results in Ames microsome assay). Concentrations were chosen to span cloning efficiences from 0 to 90.4% in preliminary cytotoxicity testing, and a survival index (cloning efficiency) was determined by Coulter count of trypsinized control and treated cells following genotoxicity assay. By study protocol, a 3-fold increase in elution rate relative to concurrent control in 2 consecutive doses constituted a biologically significant indication of genotoxicity. With correction for cell survival, alkaline filter elution of lysed treated and control cells with fluorimetric quantification of the residual DNA/dye complex disclosed no significant increase in DNA single-strand breaks relative to controls.3-Methylpyridine (CAS # 108-99-6) was evaluated for mutagenicity in cultured TA1535, TA1537, TA98, and TA100 strains of Salmonella typhimurium, both in the presence and absence of rat liver S-9 metabolic activation. In two independent assays, bacterial cultures in triplicate with and without metabolic activation were exposed to 0 (unspecified solvent control), 0.51, 1.63, 5.10, 16.30, and 51.0 uM/plate for 36-72 hours. Relative to vehicle and historical controls, exposures did not increase mean frequency of base-pair or frame-shift histidine revertants in any strain regardless of metabolic activation.
水環境危害等級（WGK）1
TSCA 収載状態TSCA listed
RTECS 番号TJ5000000
輸送番号（UN）UN 2313 3/PG 3
毒性bird - wild,LD50,oral,1gm/kg (1000mg/kg),Archives of Environmental Contamination and Toxicology. Vol. 12, Pg. 355, 1983.
PRTR法第一種指定化学物質
税関コード29333999
危険文句（R）10-20/21/22-34-36/37/38-22
化審法(5)-711
消防法危-4-2-III
危険表示C,Xn
安全措置（S）16-26-36/37/39-45-36
危険等級3Acute Tox. 3 DermalAcute Tox. 3 InhalationAcute Tox. 4 OralEye Dam. 1Flam. Liq. 3Skin Corr. 1B
包装等級III
自然発火温度~1000 °F
環境リスク評価3-メチルピリジン(108-99-6)
貯蔵分類3 - Flammable liquids
有害物質データ108-99-6(Hazardous Substances Data)