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)

1-Mercapto-2-propanone

1-sulfanylpropan-2-one

Mercaptoacetone

24653-75-6

2-Propanone, 1-mercapto-

1-Sulfanylacetone

mercapto-2-propanone

UNII-YAZ3C89IVG

YAZ3C89IVG

2-Propanone, 1-mercapto- (8CI,9CI)

acetonylmercaptan

mercaptopropanone

Acetonyl mercaptan

2-Oxopropanethiol

2-PROPANONE, MERCAPTO-

3-MERCAPTO-2-PROPANONE

FEMA NO. 3856

CHEBI:89835

FEMA 3856

DTXSID50179396

AKOS006274406

1-MERCAPTO-2-PROPANONE [FHFI]

NS00125789

EN300-92052

Q27162020

Dimethylselenide

DIMETHYL SELENIDE

593-79-3

Dimethylselenium

Methyl selenide

Methyl selenium

Methane, selenobis-

(Methylselanyl)methane

methylselanylmethane

Selenide, dimethyl-

Selenium dimethyl

(CH3)2Se

YK0R6JKT6H

EINECS 209-807-4

UNII-YK0R6JKT6H

BRN 1696848

dimethylselane

Selenobismethane

Dimethyl-Selenide

HSDB 7900

Selenobis-Methane

MFCD00014848

Selenobismethane, 9CI

Methyl selenide, 8CI

Methyl selenide (8CI)

(Methylselanyl)methane #

Methane, selenobis- (9CI)

4-01-00-01288 (Beilstein Handbook Reference)

DIMETHYLSELENIDE [HSDB]

CHEBI:4610

DTXSID6074752

AKOS015840123

Dimethyl selenide, >=99.0% (GC)

HY-W174486

CS-0235614

D1289

NS00080219

C02535

T71107

EN300-1590162

Q22668715

Selenium volatilizes from soils at rates that are modified by temperature, moisture, time, season or year, concentration of water soluble selenium, and microbiological activity. Conversion of inorganic and organic selenium compounds to volatile selenium compounds (such as dimethyl selenide, dimethyl diselenide, and an unknown compound) by microorganisms has been observed in lake sediments of the Sudbury area of Ontario. This conversion may have been effected by pure cultures of Aeromonas, Flavobacterium, Pseudomonas, or an unidentified fungus, all of which are found in methylated lake sediments. Production of volatile selenium is temperature dependent. Compared with the amount of dimethyl Se produced at an incubation temperature of 20 deg C, 25% less was produced at 10 deg C and 90% less at 4 deg C.
Literature: Eisler R; Selenium hazards to fish, wildlife and invertebrates: a synoptic review. U.S. Fish and Wildlife Service Biological Report 85 (1.5) p.4 (1985)

The Kd values measured in unamended, manure-amended and gluten-amended Hanford sandy loam at 4 deg C were 0.038, 0.091 and 0.045, respectively; there was no detection at temperatures of 21 and 40 deg C, or in Losthill clay loam under the same conditions(1).
Literature: (1) Guo L et al; Environ Sci Technol 33: 2934-8 (1999)