Methyl Mercaptan
CH
3SH
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General Characteristics Health Hazards Material Recommendations
A colorless, flammable, liquefied gas with an extremely strong and repulsive smell. Highly Toxic; affects the central nervous system. Penetrating odor provides warning at dangerous concentrations. Stainless steel.
TLV-TWA Flammable Limits DOT Class / Label
0.5 ppm 4-22% 2.3 / Poison Gas
Molecular Weight Specific Gravity Specific Volume
48.1 1.66 @ 68° F 8.0 cu.ft./lb @ 70° F
CGA Valve Outlet CAS Registry No. UN Number
110 74-93-1 1064
National Stock Number (NSN) Applicable to Methyl Mercaptan MIL Specs/ Fed Specs
MSDS for Methyl Mercaptan


Grade
Part #
Purity Minimum Cylinder
Size
Volume
Lbs.
Pressure
@ 70 F
Comments
Chemically Pure
471500
99.5% Min.
Liquid Phase
LBS
0.50
15

None


Uses: Methyl Mercaptan, CH3SH, is has been used in organic synthesis and is an intermediate for jet fuel additives, fungicides, and methionine.

Description: At room temperature and atmospheric pressure methyl mercaptan is a colorless, flammable, toxic gas with an extremely disagreeable odor. It is readily liquefied and is shipped in steel cylinders and ton containers under its own vapor pressure of 15 psig @ 21.1°C.