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742805

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:
329765592
NACRES:
NA.22

vapor density

1.66 (vs air)

vapor pressure

1536 mmHg ( 20 °C)

Assay

≥98.0%

form

gas

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 may be used in the synthesis of 1,3-bis(methylthio)-2-propanol from epichlorohydrin. It can undergo steam reforming over cerium oxide to form hydrogen-rich gases (hydrogen, carbon monoxide and carbon dioxide).

Packaging

500ml high pressure aluminum cylinder equipped with a stainless steel valve according to DIN 477-1.

Other Notes

For 742805-400G-EU packaging: 1000 mL of aluminium cylinder equipped with stainless steel valve.

Recommended products

For 742805-400G-EU: outlet fitting: DIN 477-1 no. 1, Z742162 or Z742164 are the recommended regulators.

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

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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??Hydroxy??, ??Unsaturated Aldehydes via 1, 3?Bis (Methylthio) Allyllithium: trans?4?Hydroxy?2?Hexenal.
Erickson BW
Organic Syntheses, 19-19 (1974)
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)
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
N J Hayward et al.
Journal of clinical microbiology, 6(3), 195-201 (1977-09-01)
Proteus mirabilis was distinguishable from Escherichia coli and from several other species that may be associated with urinary tract infections when grown in a nutrient medium supplemented with 0.1 M L-methionine by the formation of large amounts of dimethyl disulfide
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