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2-Propanethiol Basic information
2-Propanethiol Chemical Properties
  • Melting point:−131 °C(lit.)
  • Boiling point:57-60 °C(lit.)
  • Density 0.82 g/mL at 25 °C(lit.)
  • vapor density 2.6 (vs air)
  • vapor pressure 455 mm Hg ( 37.8 °C)
  • refractive index n20/D 1.426(lit.)
  • Flash point:<−30 °F
  • storage temp. Store below +30°C.
  • pkapK1:10.86 (25°C,μ=0.1)
  • form Liquid
  • color Colorless
  • OdorPowerful skunk.
  • Odor Threshold0.000006ppm
  • Water Solubility Slightly soluble in water
  • Sensitive Air Sensitive
  • JECFA Number510
  • BRN 605260
  • Stability:Stable. Highly flammable - note low flashpoint. May form explosive mixtures with air.
  • CAS DataBase Reference75-33-2(CAS DataBase Reference)
  • NIST Chemistry Reference2-Propanethiol(75-33-2)
  • EPA Substance Registry SystemIsopropyl mercaptan (75-33-2)
Safety Information
2-Propanethiol Usage And Synthesis
  • Chemical Propertiesliquid with an exceedingly unpleasant smell
  • UsesStandard for petroleum analysis, intermediate.
  • DefinitionChEBI: An alkanethiol that is propane substituted by a sulfanyl group at position 2.
  • General DescriptionWhite liquid with a strong skunk-like odor.
  • Air & Water ReactionsHighly flammable. Soluble in water.
  • Reactivity Profile2-Propanethiol is incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. May liberate hydrogen sulfide when mixed with an acid.
  • HazardHighly flammable, dangerous fire hazard.
  • Health HazardInhalation causes loss of sense of smell, muscular weakness, convulsions, respiratory paralysis. Ingestion causes nausea and vomiting. Contact with eyes or skin causes irritation.
  • Chemical ReactivityReactivity with Water No reaction; Reactivity with Common Materials: No reactions; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
  • Purification MethodsPurify it as for propane-1-thiol above. [Beilstein 1 IV 1498.]
2-Propanethiol Preparation Products And Raw materials
2-Propanethiol(75-33-2)Related Product Information
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