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295515

Sigma-Aldrich

Methanethiol

98.0%

Synonym(s):

Mercaptan C1, Methyl mercaptan

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About This Item

Linear Formula:
CH3SH
CAS Number:
74-93-1
Molecular Weight:
48.11
Beilstein:
1696840
EC Number:
200-822-1
MDL number:
MFCD00004866
UNSPSC Code:
12142100
PubChem Substance ID:
24857792
NACRES:
NA.22

vapor density

1.66 (vs air)

vapor pressure

1536 mmHg ( 20 °C)

Assay

98.0%

expl. lim.

21.8 %

bp

6 °C (lit.)

mp

−123 °C (lit.)

SMILES string

CS

InChI

1S/CH4S/c1-2/h2H,1H3

InChI key

LSDPWZHWYPCBBB-UHFFFAOYSA-N

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Application

Methanethiol (Methyl mercaptan) may undergo steam reforming to hydrogen-rich gas over cerium oxide-coated rhodium/aluminum oxide catalyst via the solid-gas reaction under certain operating conditions. This process has potential application in toxic-waste treatment such as removal of methanethiol present in industrial-waste off-gas.

Recommended products

Z148504/Z148512 CGA 180 Regulators OR Z146951 CGA 110 Valve with Z147095 CGA 110 to CGA 180 adapter and Z146986 washer. Also recommended Z562610 Lecture bottle station.

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Signal Word

Danger

Hazard Statements

H220,H280,H331,H410

Hazard Classifications

Acute Tox. 3 Inhalation - Aquatic Acute 1 - Aquatic Chronic 1 - Flam. Gas 1A - Press. Gas Liquefied gas

Storage Class Code

2A - Gases

WGK

WGK 3

Flash Point(F)

-0.4 °F - closed cup

Flash Point(C)

-18 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Conversion of poisonous methanethiol to hydrogen-rich gas by chemisorption/reforming over nano-scale CeO2: The use of CeO2 as catalyst coating material.
Laosiripojana N
Applied Catalysis. B, Environmental, 102(1-2), 267-275 (2011)
Govindan Muthuraman et al.
Journal of hazardous materials, 193, 257-263 (2011-08-16)
In this study, an electrocatalytic wet scrubbing process was developed for the simultaneous removal of synthetic odorous gases namely, methyl mercaptan (CH(3)SH) and hydrogen sulfide (H(2)S). The initial process consists of the absorption of CH(3)SH and H(2)S gases by an
K Yaegaki et al.
Journal of periodontal research, 27(4 Pt 1), 233-238 (1992-07-01)
Volatile sulfur compounds (VSC) in mouth air were estimated by gas chromatography. The amount of VSC and the methyl mercaptan/hydrogen sulfide ratio were significantly increased in patients with periodontal disease. These two parameters also increased in proportion to the bleeding
Ari Zeida et al.
Chemical research in toxicology, 25(3), 741-746 (2012-02-07)
The oxidation of cellular thiol-containing compounds, such as glutathione and protein Cys residues, is considered to play an important role in many biological processes. Among possible oxidants, hydrogen peroxide (H(2)O(2)) is known to be produced in many cell types as
Toru Takeshita et al.
Scientific reports, 2, 215-215 (2012-02-23)
Both hydrogen sulfide (H2S) and methyl mercaptan (CH(3)SH) are frequently detected in large amounts in malodorous mouth air. We investigated the bacterial composition of saliva of 30 subjects with severe oral malodor exhibiting extreme CH(3)SH/H(2)S ratios (high H(2)S but low
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