Phosphorus oxychloride

  • Phosphoryl chloride
  • Phosphoryl trichloride
  • Trichlorophosphorus oxide
  • Trichlorophosphine oxide
Formula
POCl3
Structure
Description
A colorless fuming liquid with a pungent odor.
Uses
Solvent in cryoscopy.

Registry Numbers and Inventories.
CAS
10025-87-3
EC (EINECS/ELINCS)
233-046-7
EC Index Number
015-009-00-5
EC Class
Reacts violently with water; Contact with water liberates toxic gas; Very toxic; Toxic; Harmful; Corrosive
R 14 22 26 35 48/23
S 7/8 26 36/37/39 45
RTECS
TH4897000
RTECS class
Other
UN (DOT)
1810
Merck
12,7506
Beilstein/Gmelin
2272 (G)
Swiss Giftliste 1
G-2741
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Cl3OP
Formula mass
153.33
Melting point, °C
1 - 2
Boiling point, °C
107
Decomposition point, °C
193
Vapor pressure, mmHg
35 (25 C)
Vapor density (air=1)
5.3
Critical temperature
332
Density
1.645 g/cm3 (20 C)
Solubility in water
Reacts
Partition coefficient, pKow
1.26
Heat of vaporization
34.6 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Corrosives area. Store in a suitable container in a dry area above the substance's freezing point. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Wash hands before eating. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Follow all MSDS and label precautions even after container is emptied because they may contain product residues. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Do not allow contact with water.
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
Avoid runoff into storm sewers and ditches which lead to waterways. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Provide ventilation.
Disposal code
24
Stability
Stable at room temperature in closed containers under normal storage and handling conditions. Combines vigorously with water with the evolution of heat.
Incompatibilities
Metals, acids, alcohols, aluminum, amines, phenols. Explosive reactions with 2,6-Dimethylpyridine N-Oxide, Dimethyl Sulfoxide, Ferrocene-1,1'Dicarboxylic Acid, Pyridine N-Oxide (above 60 C), Sodium + Heat. Violent reactions with BI3, Carbon Disulfide, 2,5-Dimethylpyrrole + Dimethyl Formamide, Organic Matter, Zinc Powder. Reacts violently with water and/or steam to produce heat and toxic corrosive fumes.
Decomposition
Hydrogen chloride, phosphine, oxides of phosphorus, irritating and toxic fumes and gases, phosphorous fumes.

Fire.
Flash Point,°C
-18
Fire fighting
Extinguish by smothering with suitable dry chemical. Use water on combustibles burning in vicinity of this material. Use dry chemical, carbon dioxide, or dry sand; 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 absorb vapors; cool all affected containers with flooding quantities of water; apply water from as far a distance as possible.
Fire potential
May burn but not ignite readily. May ignite combustibles (wood, paper, oil, clothing, etc.).
Hazards
Poisonous, corrosive, and irritating gases are generated when this material is heated or is in contact with water. It may ignite other combustible materials (wood, paper, oil, etc.). It reacts violently with water. When heated to decomposition, it emits toxic fumes of chlorides and oxides of phosphorus; it will react with water or steam to produce heat and toxic and corrosive fumes. Incompatible with carbon disulfide; N,N-dimethylformamide; 2,5-dimethylpyrrole; 2,6-dimethyl- pyridine N-oxide; dimethylsulfoxide; Ferrocene-1,1-dicarboxylic acid; water; and zinc. Do not store with combustible materials, particularly fibrous organic materials, or with electrical or other equipment that can be corroded. Reacts violently with moisture.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases. Reaction with water may generate much heat which will increase the concentration of fumes in the air.
Health
4
 
Flammability
0
 
 
Reactivity
2
 
 
Special
W

Health.
Exposure limit(s)
TLV: 0.1 ppm; 0.63 mg/m3 (as TWA) (ACGIH 1997). NIOSH REL: TWA 0.1 ppm (0.6 mg/m3) ST 0.5 ppm (3 mg/m3)
Poison_Class
1
Exposure effects
May cause liver and kidney damage. Chronic exposure can lead to necrosis of the jaw, or 'phossy-jaw'.
   Ingestion
Harmful if swallowed. Causes gastrointestinal irritation with nausea, vomiting and diarrhea. Causes digestive tract burns with immediate pain, swelling of the throat, convulsions, and possible coma.
   Inhalation
May be fatal if inhaled. May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. May cause severe irritation of the upper respiratory tract with pain, burns, and inflammation. Vapors may cause dizziness or suffocation. May cause nausea, dizziness, and headache. Exposure may produce pulmonary edema which may progress to pneumonia, and cardiac failure may intervene.
   Skin
Causes severe skin irritation and burns. Causes redness and pain.
   Eyes
Causes severe eye irritation and burns.

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. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. Call a poison control center.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. 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. Remove all contaminated clothing immediately.
   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
1810
Response guide
Hazard class
8
PRTC
T
Packing Group
II
 
USCG CHRIS Code
PPO
 
HS Code
2812 10 11
 
Std. Transport #
4932352