Methylphosphonothioic dichloride

  • Dichloromethylphosphine sulfide
  • Methyldichlorophosphine sulfide
  • Methanephosphonothioic dichloride
  • Methylthiophosphonic dichloride
  • Methylthiophosphonic acid dichloride
Formula
CH3Cl2PS
Structure

Registry Numbers and Inventories.
CAS
676-98-2
EC (EINECS/ELINCS)
211-636-5
UN (DOT)
1760
Beilstein/Gmelin
969370
Beilstein Reference
4-04-00-03521

Properties.
Formula
CH3Cl2PS
Formula mass
148.97
Melting point, °C
-25.6
Boiling point, °C
154
Vapor pressure, mmHg
5 (25 C)
Density
1.4226 g/cm3 (20 C)
Solubility in water
Slightly soluble
Refractive index
1.5509 (20 C)
Partition coefficient, pKow
0.86
Heat of vaporization
37.1 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
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. Do not use water on material itself. Neutralize spilled material with crushed limestone, soda ash, or lime.
Stability
No data.
Incompatibilities
Incompatible with strong oxidizing agents, alcohols, bases( including amines) May react vigorously or explosively

Fire.
Flash Point,°C
44
Fire fighting
Use alcohol foam, dry chemical or carbon dioxide. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Do not use water on material itself. If large quantities of combustibles are involved, use water in flooding quantities as spray and fog. Use water spray to knock-down vapors.
Hazards
Irritating hydrogen chloride, sulfur dioxide and other fumes may be formed in fire.
Combustion products
Irritating hydrogen chloride, sulfur dioxide and other fumes may be formed in fire.

Health.
Exposure effects
   Ingestion
See inhalation.
   Inhalation
Inhalation causes irritation of nose and throat; effects are quite similar to those of phosgene. Ingestion causes irritation of mouth and stomach. Delayed, painful eye irritation may occur from exposure to vapor; liquid causes severe irritation. Contact with skin causes irritation and burns.
   Skin
See inhalation.
   Eyes
See inhalation

First aid
 
   Ingestion
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
   Inhalation
Remove victim to fresh air; alert physician to delayed effects similar to those of phosgene.
   Skin
Flush with water.
   Eyes
Flush with water for at least 15 min.

Transport.
UN number
1760
Response guide
USCG CHRIS Code
MPD
 
Std. Transport #
4933336