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Tert-dodecylmercaptan

CAS Number
25103-58-6
EC Number
246-619-1
Chemical Formula
C12H26S
Molecular Weight
202.40 g/mol

Description

Tert-dodecylmercaptan (CAS 25103-58-6 ), also known as tert-dodecanethiol and commonly abbreviated as TDM, is a branched-chain aliphatic thiol used primarily as a chain transfer agent in free-radical polymerization. Its ability to control molecular weight during polymer synthesis makes it a critical process chemical across rubber, plastics, and coatings manufacturing. TDM is most extensively used in the production of synthetic rubber. It is particularly vital for styrene-butadiene rubber (SBR) and acrylonitrile-butadiene-styrene (ABS), where it regulates polymer chain length to achieve target mechanical properties. This ensures consistency in industrial manufacturing. In emulsion polymerization for latex coatings and adhesives, it controls viscosity and film-forming characteristics of the final product. Pharmaceutical manufacturers use TDM as a reagent and intermediate in synthesis processes. These processes often require controlled thiol reactivity for precise chemical outcomes. At trace concentrations, it also functions as a flavoring agent in food applications, where sulfur-containing compounds contribute to savory profiles. Tert-dodecylmercaptan is supplied as a liquid, typically in drum and IBC quantities suited to industrial-scale polymerization operations. Technical grade is the standard commercial offering for most industrial buyers. High-purity grades are available for pharmaceutical and specialty applications. Specifications vary by supplier, and buyers should confirm purity thresholds and chain-length distribution profiles when sourcing for polymer-grade use. Contact us for supply of Tert-dodecylmercaptan Request Quote

Other Names (Synonyms)

tert-dodecanethiol | 2,3,3,4,4,5-hexamethylhexane-2-thiol | tert-dodecyl mercaptan | TDM

Key Technical Features

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

Physical Properties

Melting Point-7.5°C
Boiling Point233 °C (approx)
Density0.855 g/cm³ @ Temp: 20 °C
Flash Point195 °F
ColorColorless to Almost colorless
Formclear liquid
Water Solubility<0.1 g/100 mL at 23 ºC
Vapor Pressure1.33 hPa (25.5 °C)
Refractive Index1.4486 (estimate)
Log P7.43 at 20℃

Safety & Handling

Warning
GHS07· IrritantGHS09· EnvironmentGHS08· Health Hazard

Hazard Statements

H227Combustible liquid
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H320Causes eye 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
H413May cause long lasting harmful effects to aquatic life

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.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P391Collect spillage.
P403Store in a well-ventilated place.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
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 Number3082
ADR Class9
Packing GroupIII
Storage Class10 - Combustible liquids
WGK (Germany)2