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1-octanethiol

CAS Number
111-88-6
EC Number
203-918-1
Chemical Formula
C8H18S
Molecular Weight
146.30 g/mol

Description

1-Octanethiol (CAS 111-88-6 ), also known commercially as n-octyl mercaptan, is a sulfur-containing organic compound used as a chain transfer agent in polymer synthesis. It serves as a chemical intermediate across specialty chemical manufacturing. Its reactive thiol group makes it a functional building block in pharmaceutical and industrial processes. In polymer production, it controls molecular weight during free-radical polymerization of acrylates, styrene, and vinyl acetate. This directly influences the mechanical properties of the final resin. The pharmaceutical industry uses it as a synthetic intermediate in the preparation of active ingredients and sulfur-containing compounds for various medical applications. In lubricant formulations, it contributes to extreme-pressure additive packages for metalworking fluids. Here, sulfur-based chemistry provides boundary lubrication under high-load conditions to protect machinery and tools. It also functions as a coupling agent and surface modifier for metal nanoparticles and quantum dots in specialty materials applications. This versatility makes it essential for advanced material science and electronics. The product is supplied as a clear liquid in standard packaging ranging from drums to ISO containers, depending on volume requirements. Technical grade is the most common commercial specification for industrial use. High-purity grades are available for pharmaceutical and specialty materials applications. Suppliers typically offer material with purity levels of 98% or higher to meet strict manufacturing requirements. Certificate of analysis documentation is standard for regulated-industry procurement. This ensures that the material meets the necessary safety and performance benchmarks for global chemical distribution and logistics. Contact us for supply of 1-octanethiol Request Quote

Other Names (Synonyms)

n-octyl mercaptan | 1-octylthiol | 1-mercaptooctane | Octane-1-thiol | Octyl mercaptan | n-Octanethiol

Key Technical Features

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

Physical Properties

Melting Point-49.2 °C
Boiling Point86 °C @ Press: 15 Torr
Density0.8433 g/cm³ @ Temp: 20 °C
Flash Point55 °F
Appearancecolourless liquid
ColorClear colorless
Odorat 0.10?%?in?dipropylene glycol. sulfurous
FormLiquid
Water SolubilityNot miscible in water.
Vapor Pressure0.3 hPa (20 °C)
Refractive Indexn 20/D 1.452(lit.)
Log P4.21 at 20℃

Safety & Handling

Warning
GHS07· IrritantGHS09· EnvironmentGHS08· Health Hazard

Hazard Statements

H227Combustible liquid
H302Harmful if swallowed
H312Harmful in contact with skin
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H335May cause respiratory irritation
H336May cause drowsiness or dizziness
H371May cause damage to organs
H373May causes damage to organs through prolonged or repeated exposure
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary Statements

P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
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.
P317Get emergency medical help.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P391Collect spillage.
P403Store in a well-ventilated place.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P316Get emergency medical help immediately.
P317Get emergency medical help.
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.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29309070
UN Number1170
ADR Class3
Packing GroupII
Storage Class10 - Combustible liquids
WGK (Germany)3