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2-methylpropane-2-thiol

CAS Number
75-66-1
EC Number
200-890-2
Chemical Formula
C4H10S
Molecular Weight
90.19 g/mol

Description

2-Methylpropane-2-thiol (CAS 75-66-1 ), commercially known as tert-butyl mercaptan, is a synthetic sulfur compound used as a potent flavoring agent and odorant across food and industrial applications. Its intense, characteristic sulfurous odor makes it effective at trace concentrations, supporting both flavor creation and gas detection functions. In the flavor and fragrance industry, it is used at very low levels. This compound helps replicate roasted, savory, and sulfurous top notes in processed food formulations. Natural gas and LPG suppliers use it as an odorant additive, blending it into fuel gas streams for safety. This provides a detectable warning odor for leak detection compliance. Petroleum refiners and petrochemical processors also use it as a reference compound and intermediate in sulfur chemistry research and calibration standards. In beverage and food flavor houses, it contributes to coffee, meat, and onion flavor profiles where authentic sulfur character is required. It is available in food-grade quality meeting FEMA standards. The product is supplied as a liquid at ambient conditions, typically in small packaging formats suited to flavor and odorant applications. It also meets various flavor industry purity standards for global use. Technical grade options are available for gas odorant and industrial use. Packaging ranges from laboratory-scale quantities up to drum volumes for industrial odorant blending operations and large scale manufacturing. Contact us for supply of 2-methylpropane-2-thiol Request Quote

Other Names (Synonyms)

tert-butyl mercaptan

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point-0.5 °C
Boiling Point-63.7-64.2 °C @ Press: 760 Torr
Density0.80 g/cm³
Flash Point−12 °F
Appearanceliquid with an exceedingly unpleasant smell
ColorClear colorless
Odorsulfury
FormLiquid
Water SolubilitySlightly soluble in water
Vapor Pressure303.5 mm Hg ( 37.7 °C)
Refractive Indexn 20/D 1.423(lit.)
Log P2.206 (est)

Safety & Handling

Danger
GHS02· FlammableGHS07· IrritantGHS08· Health HazardGHS09· Environment

Hazard Statements

H225Highly Flammable liquid and vapor
H304May be fatal if swallowed and enters airways
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H320Causes eye irritation
H335May cause respiratory irritation
H336May cause drowsiness or dizziness
H373May causes damage to organs through prolonged or repeated exposure
H411Toxic to aquatic life with long lasting effects

Precautionary Statements

P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233Keep container tightly closed.
P240Ground and bond container and receiving equipment.
P241Use explosion-proof equipment.
P242Use non-sparking tools.
P243Take action to prevent static discharges.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P271Use only outdoors or in a well-ventilated area.
P272Contaminated work clothing should not be allowed out of the workplace.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P331Do NOT induce vomiting.
P391Collect spillage.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P316Get emergency medical help immediately.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P378Use … for extinction.
P233Store in a well-ventilated place. Keep container tightly closed.
P235Store in a well-ventilated place. Keep cool.
P353IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29309090
UN Number2347
ADR Class3
Packing GroupII
Storage Class3 - Flammable liquids
WGK (Germany)3