methanethiol

METHYL MERCAPTAN

Methylmercaptan

Mercaptomethane

74-93-1

Methyl sulfhydrate

Thiomethanol

Methanthiol

Thiomethyl alcohol

Metilmercaptano

Methvtiolo

Methylmercaptaan

Mercaptan methylique

Methaanthiol

Thiomethane

RCRA waste number U153

FEMA No. 2716

Methanethiole

CH3SH

methyl-mercaptan

Methyl thioalcohol

MeSH

UN 1064

2X8406WW9I

Methaanthiol [Dutch]

Methanthiol [German]

Methvtiolo [Italian]

Methylmercaptaan [Dutch]

Metilmercaptano [Italian]

Metilmercaptano [Spanish]

SCH 54292

Methyl mercaptan (natural)

Mercaptan methylique [French]

HSDB 813

EINECS 200-822-1

UN1064

RCRA waste no. U153

BRN 1696840

methylsulfanyl

methane thiol

methyl sulfides

methyl thiol

methyl-thiol

UNII-2X8406WW9I

(methyl)sulfane

Methylthioalcohol

a methyl thioether

sulfonium methylide

Methanethiol, purum

Methanethiol, 98.0%

METHANETHIOL [MI]

EC 200-822-1

Methanethiol, >=98.0%

4-01-00-01273 (Beilstein Handbook Reference)

METHYL MERCAPTAN [FHFI]

METHYL MERCAPTAN [HSDB]

DTXSID5026382

CHEBI:16007

CHEBI:86315

DTXSID10168842

DTXSID60992376

InChI=1/CH4S/c1-2/h2H,1H

NSC229573

AKOS009157032

NSC-229573

Methyl mercaptan [UN1064] [Poison gas]

NS00020025

C00409

Q409309

17719-48-1

Z22

The Henry's Law constant for methyl mercaptan is estimated as 0.0031 atm-cu m/mole(SRC) derived from its vapor pressure, 1,510 mm Hg(1), and water solubility, 15,400 mg/L(2). This Henry's Law constant indicates that methyl mercaptan is expected to volatilize rapidly from water surfaces(3). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(3) is estimated as 0.8 hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(3) is estimated as 2.8 days(SRC). Methyl mercaptan's Henry's Law constant indicates that volatilization from moist soil surfaces is expected to occur(SRC). Methyl mercaptan is expected to volatilize rapidly from dry soil surfaces based upon its vapor pressure and because it is a gas a temperatures above 6 deg C(SRC). However, gaseous methyl mercaptan gas has been found to strongly adsorb to moist and dry soil surfaces suggesting that adsorption might be an environmental sink for methyl mercaptan(4). Therefore, the importance of volatilization from soil surfaces may be attenuated by adsorption(SRC).
Literature: (1) Daubert TE, Danner RP; Physical and Thermodynamic Properties of Pure Chemicals Data Compilation. Washington, DC: Taylor and Francis (1989) (2) Hine J, Mookerjee PK; J Org Chem 40: 292-8 (1975) (3) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990) (4) Smith KA et al; Soil Sci 116: 313-9 (1973)

Using a structure estimation method based on molecular connectivity indices(1), the Koc of methyl mercaptan can be estimated to be 13(SRC). According to a classification scheme(2), this estimated Koc value suggests that methyl mercaptan is expected to have very high mobility in soil. Gaseous methyl mercaptan has been observed to partition to soils(3). For example, when gaseous methyl mercaptan was passed over six air-dried and moist (50% field capacity) soils, 2.4-32.1 mg/g and 2.2-21.4 mg/g of methyl mercaptan rapidly adsorbed to the dry and moist soils, respectively(3). Neither the capacity or rate of sorption was correlated to soil pH, organic matter content, or clay content; sterile controls ruled out the involvement of microorganisms(3); it was suggested that adsorption to soil surfaces might be an environmental sink for gaseous methyl mercaptan(3).
Literature: (1) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Jan, 2011. Available from, as of July 19, 2012: http://www.epa.gov/oppt/exposure/pubs/episuitedl.htm (2) Swann RL et al; Res Rev 85: 17-28 (1983) (3) Smith KA et al; Soil Sci 116: 313-9 (1973)

dimethyl sulfide

Methyl sulfide

75-18-3

Methane, thiobis-

dimethyl sulphide

dimethylsulfide

Methyl thioether

Dimethylsulphide

2-Thiapropane

Dimethyl thioether

Methyl sulphide

METHYLSULFANYLMETHANE

Methylthiomethane

Dimethylsulfid

(Methylsulfanyl)methane

Methyl monosulfide

Dimethyl monosulfide

Thiobismethane

2-Thiopropane

Methanethiomethane

Thiobis(methane)

Exact-S

Sulfure de methyle

Dimethyl sulfide (natural)

dimethylsulfane

FEMA No. 2746

Methylthiomethyl radical

MFCD00008562

Methane, 1,1'-thiobis-

[SMe2]

QS3J7O7L3U

CHEBI:17437

(CH3)2S

31533-72-9

methylsulfide

Dimethylsulfid [Czech]

Sulfure de methyle [French]

HSDB 356

EINECS 200-846-2

UN1164

UNII-QS3J7O7L3U

BRN 1696847

Methylsulphide

Thiopropane

Thiobis-methane

di-methylsulfide

AI3-25274

Dimethyl sulfane

Sulfide, methyl-

(methylthio)methane

Me2S

REDUCED-DMSO

SMe2

Dimethyl sulfide, 98%

reduced dimethyl sulfoxide

(Methylsulfanyl)methane #

Dimethyl sulfide [UN1164] [Flammable liquid]

Dimethyl sulfoxide(Reduced)

EC 200-846-2

(Me)2S

Dimethyl sulfide, >=99%

4-01-00-01275 (Beilstein Handbook Reference)

CHEMBL15580

DIMETHYL SULFIDE [MI]

METHYL SULFIDE [FHFI]

DIMETHYL SULFIDE [FCC]

DIMETHYL SULFIDE [HSDB]

DTXSID9026398

S(CH3)2

Dimethyl sulfide, >=99%, FCC

Dimethyl sulfide, analytical standard

STL481894

Dimethyl sulfide, >=95.0% (GC)

AKOS009031411

MCULE-4525381422

UN 1164

Dimethyl sulfide, anhydrous, >=99.0%

InChI=1/C2H6S/c1-3-2/h1-2H

M0431

NS00005000

NS00124710

Dimethyl sulfide, puriss., >=99.0% (GC)

C00580

Dimethyl sulfide, natural, >=99%, FCC, FG

Dimethyl sulfide [UN1164] [Flammable liquid]

A838342

Dimethyl sulfide, redistilled, >=99%, FCC, FG

Q423133

Q-100810

The Henry's Law constant for dimethyl sulfide has been measured as 1.61X10-3 atm-cu m/mole(1). This Henry's Law constant indicates that dimethyl sulfide is expected to volatilize rapidly from water surfaces(2). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(2) is estimated as 3 hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(2) is estimated as 3 days(SRC). Dimethyl sulfides's Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). The potential for volatilization of dimethyl sulfide from dry soil surfaces may exist(SRC) based upon a vapor pressure of 502 mm Hg(3).
Literature: (1) Gaffney, JS et al; Env Sci Tech 21: 519-23 (1987) (2) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990) (3) Daubert TE, Danner RP; Physical and Thermodynamic Properties of Pure Chemicals: Data Compilation. Vol 4. Design Inst Phys Prop Data, Amer Inst Chem Eng, NY, NY: Hemisphere Pub Corp (1989)

The Koc of dimethyl sulfide is estimated as 6.3(SRC), using a water solubility of 22,000 mg/L(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that dimethyl sulfide is expected to have very high mobility in soil.
Literature: (1) Suzuki T; J Comp-Aided Molec Des 5: 149-66 (1991) (2) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.0. Jan, 2009. Available from http://www.epa.gov/oppt/exposure/pubs/episuitedl.htm as of Oct 1, 2009. (3) Swann RL et al; Res Rev 85: 17-28 (1983)
Literature: #Air-dried, unsterilized moist, and sterilized moist soils exposed to air initially containing 500 ppm dimethyl sulfide adsorbed an avg of 32, 308, and 10 ug dimethyl sulfide/g soil, respectively, in 15 days(1). Time required for complete sorption of dimethyl sulfide by moist soil from air initially containing 100 ppm dimethyl sulfide: soil 1 (Weller) - 1st exposure 150 min, 2nd exposure 100 min, 3rd exposure 95 min; soil 2 (Harps) - 1st exposure 45 min, 2nd exposure 24 min, 3rd exposure 19 min(1). These data suggest that moist soils have a greater tendency to adsorb dimethyl sulfide than dry soils, and that microbial activity in moist soils may be responsible for greater adsorption(1). When natural gas containing 0.5 pounds of dimethyl sulfide per million cubic feet of gas was passed through a bed of pulverized, dry, montmorillonite clay, dimethyl sulfide exhibited a fast breakthrough (2 hours) and a fast build-up rate in effluent gas (85% of influent concn 4 hours after breakthrough), suggesting that dimethyl sulfide does not adsorb to dry soils(2).
Literature: (1) Bremner JM, Banwart WL; Soil Biol Biochem 8: 79-83 (1976) (2) Williams RP; Oper Sect Proc - Am Gas Assoc pp. T29-T37 (1976)