Trichloromethyl mercaptan

  • Perchlorinemethylmercaptan
  • Perchloromethanethiol
  • Perchloromethyl mercaptan
  • Trichloromethanethiol
Formula
CHCl3S
Structure

Registry Numbers and Inventories.
CAS
75-70-7
EC (EINECS/ELINCS)
209-840-4
UN (DOT)
1670
Beilstein/Gmelin
1732538
Beilstein Reference
3-03-00-00247
RCRA
P118
US TSCA
Listed

Properties.
Formula
CHCl3S
Formula mass
151.45
Boiling point, °C
149
Vapor pressure, mmHg
4.7 (25 C)
Density
1.722 g/cm3 (0 C)
Solubility in water
Insoluble
Surface tension
35.02 g/s2
Refractive index
1.5408 (20 C)
Partition coefficient, pKow
4.67
Heat of vaporization
37.2 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Make no contact with the spilled material. Fully encapsulating, vapor protective clothing should be worn for spills and leaks with no fire. ELIMINATE all ignition sources and ground all equipment. Stop leak if you can do it without risk. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collect absorbed material.
Stability
No data.

Fire.
Flash Point,°C
53
Fire fighting
Use of water spray when fighting fire may be inefficient. Small Fires: Dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Large Fires: Water spray, fog or alcohol-resistant foam.
Fire potential
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
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
Fire will produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects
Fever may be noted in patients with severe inhalation exposure and respiratory tract injury. Central nervous system depression and seizures may develop.
   Ingestion
Nausea, vomiting, diarrhea, abdominal pain and mucosal ulceration may be seen.
   Inhalation
Severe respiratory tract irritation with cough, chest tightness or discomfort, or pulmonary edema may be seen. Necrotizing tracheitis was found in a fatal case with inhalation and dermal exposure.
   Skin
Skin irritation may occur.
   Eyes
Inflammation of the eye, tearing, and mucosal irritation of the nose and throat may be noted.

First aid
 
   Ingestion
The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation. Activated charcoal activated charcoal binds most toxic agents and can decrease their systemic absorption if administered soon after ingestion. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. Treatment should include recommendations listed in the oral exposure section when appropriate.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
1670
Response guide
Hazard class
6.1
Packing Group
I
 
USCG CHRIS Code
PCM