1-Dodecanethiol

  • Dodecyl mercaptan
  • Lauryl mercaptan
  • 1-Mercaptododecane
  • Dodecane-1-thiol
Formula
CH3(CH2)11SH
Structure
Description
Colorless to pale yellow liquid, mild skunk odor.
Uses
In manufacture of synthetic rubber, plastics, pharmaceuticals, insecticides, fungicides.

Registry Numbers and Inventories.
CAS
112-55-0
EC (EINECS/ELINCS)
203-984-1
EC Class
irritant
R 36/38 43
RTECS
JR3155000
RTECS class
Mutagen
UN (DOT)
1228
Beilstein/Gmelin
969337
Beilstein Reference
4-01-00-01851
Swiss Giftliste 1
G-5927
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C12H26S
Formula mass
202.41
Melting point, °C
-7
Boiling point, °C
266
Vapor pressure, mmHg
2.5
Saturation Concentration
3300 ppm at 25 C (calc.)
Density
0.855 g/cm3
Solubility in water
Insoluble
Refractive index
1.464

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use.
B3 D2B
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal.
Disposal code
6
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong acids, strong bases, alkali metals.
Decomposition
Carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen sulfide.

Fire.
Flash Point,°C
87
Autoignition, °C
230
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire, use water fog, dry chemical, carbon dioxide, or regular foam.
Fire potential
Slightly flammable. Combustion requires preheating.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion and poison hazard indoors, outdoors or in sewers.
Combustion products
Poisonous and irritating gases (e.g., sulfur dioxide) are generated in fires.
Health
2
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: C 0.5 ppm (4.1 mg/m3) 15-minute
Poison_Class
4
Exposure effects
Repeated exposure may cause sensitization dermatitis.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause respiratory tract irritation.
   Skin
Causes skin irritation. May cause dermatitis. May cause reddening of the skin. Chronic exposure may result in sensitization.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1228
Response guide
Hazard class
3
Packing Group
II; III
 
USCG CHRIS Code
LRM
 
HS Code
2930 90 70