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)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H220 Extremely flammable gas Flammable gases Category 1 Danger P210, P377, P381, P403 H280 Contains gas under pressure; may explode if heated Gases under pressure Compressed gas Liquefied gas Dissolved gas Warning P410+P403 H331 Toxic if inhaled Acute toxicity,inhalation Category 3 Danger P261, P271, P304+P340, P311, P321,P403+P233, P405, P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P273 Avoid release to the environment. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P410+P403 Protect from sunlight. Store in a well-ventilated place.