Diethylthiophosphoryl chloride

  • Diethyl phosphorochlorodithionate
  • Diethyl chlorothiophosphate
  • Phosphorochloridothioic acid O,O-diethylester
  • O,O-diethyl phosphorochloridothioate
Formula
C4H10ClO2PS
Structure
Description
A colorless to light amber liquid with a disagreeable odor.
Uses
Intermediate for pesticides, oil & gasoline additives, flame retardants, flotation agents.

Registry Numbers and Inventories.
CAS
2524-04-1
EC (EINECS/ELINCS)
219-755-4
RTECS
TD1780000
RTECS class
Other
UN (DOT)
2751
Beilstein/Gmelin
471434
Beilstein Reference
4-01-00-01352
Swiss Giftliste 1
G-5949
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H10ClO2PS
Formula mass
188.62
Melting point, °C
<-75
Boiling point, °C
178
Vapor pressure, mmHg
0.9 (25 C)
Density
1.202 g/cm3 (0 C)
Solubility in water
Insoluble
Refractive index
1.4708 (20 C)
Partition coefficient, pKow
821
Heat of vaporization
40.6 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Corrosives area.
Handling
Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.
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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Hydrogen chloride, carbon monoxide, oxides of sulfur, oxides of phosphorus, carbon dioxide.

Fire.
Flash Point,°C
75
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use foam, dry chemical, or carbon dioxide.
Fire potential
HIGHLY FLAMMABLE.
Hazards
Vapors form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
OEL-RUSSIA:STEL 1 mg/m3
Poison_Class
2
Exposure effects
Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.
   Ingestion
Harmful if swallowed.
   Inhalation
May be fatal if inhaled. Causes chemical burns to the respiratory tract.
   Skin
Harmful if absorbed through the skin. Causes skin burns.
   Eyes
Causes eye burns.

First aid
 
   Ingestion
Get medical aid immediately. Wash mouth out with water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately 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
2751
Response guide
Hazard class
8
Packing Group
II
 
Std. Transport #
4936509