Phosphorus oxybromide

  • Phosphoryl tribromide
  • Phosphoryl bromide
  • Phosphoric tribromide
  • Phosphorus oxybromide, molten (UN 2576)
Formula
POBr3
Structure
Description
Solidifies if cooled below 56 C.
Uses
Principally used as chemical intermediate.

Registry Numbers and Inventories.
CAS
7789-59-5
EC (EINECS/ELINCS)
232-177-7
EC Class
corrosive
R 34 37
S 7/8 26 36/37/39 45
RTECS
TH4750000
UN (DOT)
1939, 2576
Merck
12,7505
Beilstein/Gmelin
2533 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Br3OP
Formula mass
286.70
Melting point, °C
52 - 55
Boiling point, °C
193
Vapor pressure, mmHg
0.8 (25 C)
Density
2.88 g/cm3
Solubility in water
Decomposes
Partition coefficient, pKow
1.76
Heat of vaporization
38.0 kJ/mol

Hazards and Protection.
Storage
should be stored in a cool, well-ventilated place, out of direct rays of sun, away from areas of high fire hazard, and.Periodically inspected and monitored. Incompatible materials should be isolated. Store in sealed glass ampules.
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
Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Use water spray to knock-down vapors. Do not use water on material itself. Neutralize spilled material with crushed limestone, soda ash, or lime.
Disposal code
24
Stability
No data.
Incompatibilities
Reacts with organic materials causing fire Incompatible with strong oxidizing agents, alcohols, bases (including amines) May react vigorously or explosively
Decomposition
When heated to decomposition, it emits highly toxic fumes of bromides and po(x).

Fire.
Flash Point,°C
-18
Fire fighting
Use dry chemical, dry sand, or carbon dioxide. 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. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.
Fire potential
May burn but does not ignite readily.
Hazards
May ignite combustibles (wood, paper, oil, clothing, etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases. Flammable/toxic gases may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.)Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. Substance may be transported in a molten form.
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.
Exposure effects
Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.
   Ingestion
Ingestion of acids may result in burns, gastrointestinal bleeding, gastritis, perforations, dilation, edema, necrosis, vomiting, stenosis, fistula, and duodenal/jejunal injury.
   Inhalation
Inhalation may produce dyspnea, pleuritic chest pain, upper airway edema, pulmonary edema, hypoxemia, bronchospasm, pneumonitis, and persistent pulmonary function abnormalities. Airway hyperreactivity has also been reported.
   Skin
See Inhalation.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.Administer oxygen if breathing is difficult.
   Skin
Remove contaminated clothing, wash exposed area with copious amounts of water. A physician should examine the area if irritation or pain persists.
   Eyes
In case of contact with substance, immediately flush with running water for at least 20 minutes.

Transport.
UN number
1939, 2576
Response guide
Hazard class
8
PRTC
T
HS Code
2812 90 00
 
Std. Transport #
4932368