Benzene phosphorus dichloride

  • Phenyl phosphorus dichloride
  • Dichlorophenylphosphine
  • Dichloro(Phenyl)phosphine
Formula
C6H5PCl2
Structure
Description
Clear, colorless liquid. Acrid, pungent.
Uses
Organic synthesis, for derivation of plasticizers, polymers, antioxidants, oil additives.

Registry Numbers and Inventories.
CAS
644-97-3
EC (EINECS/ELINCS)
211-425-8
EC Class
harmful, corrosive
R 25 34
S 26 36/37/39 45
RTECS
TB2478000
RTECS class
Other
UN (DOT)
2798
Beilstein/Gmelin
508189
Beilstein Reference
4-16-00-00972
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C6H5Cl2P
Formula mass
178.99
Melting point, °C
-51
Boiling point, °C
222
Vapor pressure, mmHg
0.14 (25 C)
Vapor density (air=1)
6.2
Density
1.320 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
3.68 cp (23 C)
Surface tension
est 25 g/s2
Refractive index
1.5967 (20 C)
Partition coefficient, pKow
4.59
Heat of vaporization
44.2 kJ/mol
Heat of combustion
-3410 kJ/mol

Hazards and Protection.
Storage
Keep container closed when not in use. Corrosives area. Store protected from moisture.
Handling
Keep container tightly closed. Do not get on skin or in eyes. Do not ingest or inhale. Use with adequate ventilation. Do not allow contact with water. Discard contaminated shoes. Keep from contact with moist air and steam.
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 minimize contact with skin.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation. Do not get water inside containers.
Disposal code
24
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Moisture, strong oxidizing agents.
Decomposition
Hydrogen chloride, carbon monoxide, oxides of phosphorus, carbon dioxide.

Fire.
Flash Point,°C
89
Autoignition, °C
159
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Containers may explode when heated. Extinguishing media: Use foam, dry chemical, or carbon dioxide. If water is the only media available, use in flooding amounts. Do NOT get water inside containers. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Flammable.
Hazards
Containers may rupture. Hot liquid is spontaneously flammable because of presence of dissolved phosphorus.
Combustion products
Toxic fumes include oxides of phosphorus and hydrogen chloride.
Health
3
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure effects
Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.
   Ingestion
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns.
   Inhalation
May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. Causes chemical burns to the respiratory tract.
   Skin
Causes skin burns.
   Eyes
Contact with eyes may cause severe irritation, and possible eye burns.

First aid
 
   Ingestion
Do NOT induce vomiting. 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
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   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. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
2798
Response guide
Hazard class
8
Packing Group
II
 
USCG CHRIS Code
BPD
 
HS Code
2931 00 95
 
Std. Transport #
4931715