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METHYL MERCAPTAN Structure

METHYL MERCAPTAN

Chemical Properties

Melting point −123 °C(lit.)
Boiling point 6 °C(lit.)
Density  0.8665
vapor density  1.66 (vs air)
vapor pressure  1536 mm Hg ( 20 °C)
FEMA  2716 | METHYL MERCAPTAN
refractive index  1.4020 (estimate)
Flash point <71℃
solubility  Soluble in alcohol, ether (Weast, 1986), and petroleum naphtha (Hawley, 1981)
form  liquid
pka 10.3(at 25℃)
Odor at 0.01 % in propylene glycol. decomposing cabbage garlic
Odor Type sulfurous
explosive limit 21.8%
Odor Threshold 0.00007ppm
Water Solubility  23.30 g/L at 20 °C (quoted, Windholz et al., 1983)
0.330 mol/L at 25 °C (Hine and Weimar, 1965)
JECFA Number 508
Merck  13,5983
BRN  1696840
Henry's Law Constant 3.03 (Hine and Weimar, 1965)
Exposure limits TLV-TWA 0.5 ppm (~1.0 mg/m3 ) (ACGIH and MSHA); ceiling 10 ppm (OSHA); IDLH 400 ppm (NIOSH); the revised IDLH is 150 ppm in analogy to H2S.
Stability Stable. Highly flammable - note low flash point. Reacts vigorously or explosively with a wide variety of materials - consult a full MSDS data sheet before using. Incompatible with strong oxidizing agents, alkali and alkaline earth metals, epoxides, hydrazines, ketones, lead, mercury (II) oxide, azo- and diazo- compounds, copp
LogP 0.72
CAS DataBase Reference 74-93-1(CAS DataBase Reference)
EPA Substance Registry System Methyl mercaptan (74-93-1)

Safety Information

Hazard Codes  F+,T,N
Risk Statements  12-23-50/53
Safety Statements  16-25-60-61
RIDADR  UN 2037 2.3
WGK Germany  3
RTECS  PB4375000
13-27
HazardClass  2.3
Hazardous Substances Data 74-93-1(Hazardous Substances Data)
Toxicity LC50 (inhalation) for mice 6,530 μg/m3/2-h, rats 675 ppm (quoted, RTECS, 1985).
IDLA 150 ppm

MSDS

Usage And Synthesis

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