Tert-dodecylmercaptan
CAS Number
25103-58-6
EC Number
246-619-1
Abbreviation
TDM
What is Tert-dodecylmercaptan?
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.
Where is Tert-dodecylmercaptan used?
- Synthetic rubber: chain transfer agent for styrene-butadiene rubber (SBR) and acrylonitrile-butadiene-styrene (ABS), regulating polymer chain length to achieve target mechanical properties
- Latex coatings and adhesives: controls viscosity and film-forming characteristics in emulsion polymerization
- Pharmaceutical synthesis: reagent and intermediate requiring controlled thiol reactivity
- At trace concentrations it functions as a flavoring agent in food applications.
Good to know: Specifications vary by supplier; buyers should confirm purity thresholds and chain-length distribution profiles when sourcing for polymer-grade use.
Commercial specifications
- Liquid, typically in drum and IBC quantities
- High-purity grades for pharmaceutical and specialty applications
Other Names (Synonyms)
tert-dodecanethiol|2,3,3,4,4,5-hexamethylhexane-2-thiol|tert-dodecyl mercaptan|TDM
What are the physical properties of Tert-dodecylmercaptan?
Melting Point -7.5°C
Boiling Point 233 °C (approx)
Density 0.855 g/cm³ @ Temp: 20 °C
Flash Point 195 °F
Color Colorless to Almost colorless
Form clear liquid
Water Solubility <0.1 g/100 mL at 23 ºC
Vapor Pressure 1.33 hPa (25.5 °C)
Refractive Index 1.4486 (estimate)
Log P 7.43 at 20℃
How is Tert-dodecylmercaptan classified and handled safely? Learn More
Warning
GHS07· Irritant GHS09· Environmental Hazard GHS08· Health Hazard
Hazard Statements
H227 Combustible liquid
H315 Causes skin irritation
H317 May cause an allergic skin reaction
H319 Causes serious eye irritation
Precautionary Statements
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
Which trade and regulatory codes apply to Tert-dodecylmercaptan?
HS Code 29309070
UN Number 3082
ADR Class 9
Packing Group III
Storage Class 10 - Combustible liquids
WGK (Germany) 2