2-Propanethiol CAS 75-33-2

High-Purity 2-Propanethiol CAS 75-33-2 from Aure Chemical: Stable Supply & Compliance

2-Propanethiol, commonly known as isopropyl mercaptan, is a volatile organosulfur compound characterized by a strong, distinctive odor. It is widely employed in industrial applications that require its reactivity as a thiol and its low odor threshold. Aure Chemical provides this material to support customers in gas odorization, organic synthesis and specialty chemical manufacturing.

Basic Information

CAS No.	75-33-2
EC No.	200-861-4
Linear Formula	(CH3)2CHSH
Molecular Weight	76.16
Appearance	Colorless to almost colorless clear liquid
Melting Point	−131 °C (lit.)
Boiling point	57-60 °C (lit.)
Density	0.82 g/mL at 25 °C (lit.)
RIDADR	UN 2402 Class 3 / PG II
Chemical Structure

Key Applications

• Natural gas and LPG odorant – Primary industrial use as a warning agent due to its extremely low odor threshold and distinctive skunk-like smell, enabling leak detection in otherwise odorless fuel gases.

• Chemical intermediate in organic synthesis – Serves as a nucleophilic thiol source for the preparation of thioethers, disulfides and other sulfur-containing compounds used in pharmaceuticals and agrochemicals.

• Chain transfer agent in radical polymerization – Employed to control molecular weight and chain length during the production of specialty polymers and resins.

• Flavor and fragrance intermediate – Approved as a flavoring agent (FEMA 3897) at very low concentrations for savory, onion- and meat-like notes in food applications.

• Petroleum analysis standard and rubber additive – Used as a reference standard in hydrocarbon analysis and as a functional additive in certain rubber and polymer formulations.

Aure Chemical: Your Reliable Partner for 2-Propanethiol

• Reliable product quality – Strict batch-to-batch consistency and high-purity grades suitable for demanding industrial and analytical applications.

• Efficient international logistics – Established export channels and flexible supply arrangements support timely delivery of both laboratory and bulk quantities worldwide.

• Complete regulatory documentation – SDS, COA and dangerous-goods paperwork are provided to meet international safety and transportation requirements.

• Responsive technical support – Assistance with packaging selection, handling guidance and shipment planning is available to facilitate smooth procurement.

Hazards Classification

GHS Classification: Flammable liquids (Category 2) – GHS02; Skin irritation (Category 2) – GHS07; Serious eye irritation (Category 2) – GHS07; Skin sensitization (Category 1) – GHS07; Hazardous to the aquatic environment, chronic (Category 1) – GHS09

Hazard Statements: H225 Highly flammable liquid and vapor; H315 Causes skin irritation; H319 Causes serious eye irritation; H317 May cause an allergic skin reaction; H410 Very toxic to aquatic life with long lasting effects

UN Number: UN 2402

Hazard Class: 3

Packing Group: II