PHOSPHORUS PENTABROMIDE Chemical Properties

Melting point:

105-107°C (dec.)

Boiling point:

105-107°C

Density 

3.610

Flash point:

105-107°C

solubility 

reacts with H2O, ethanol; soluble inCS2, ctc

form 

yellow orthorhombic crystals

color 

yellow orthorhombic crystals, crystalline, hygroscopic

Water Solubility 

Reacts with water.

Sensitive 

Moisture Sensitive

Merck 

14,7350

BRN 

3903332

InChIKey

QRKVRHZNLKTPGF-UHFFFAOYSA-N

CAS DataBase Reference

7789-69-7(CAS DataBase Reference)

EPA Substance Registry System

Phosphorane, pentabromo- (7789-69-7)

Safety Information

Hazard Codes 

C

Risk Statements 

14-34

Safety Statements 

26-36/37/39-45

RIDADR 

UN 2691 8/PG 2

WGK Germany 

3

TSCA 

Yes

HazardClass 

8

PackingGroup 

II

HS Code 

28129000

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

PHOSPHORUS PENTABROMIDE Usage And Synthesis

Chemical Properties

yellow crystal(s); -60 mesh with 99.9% purity; decomposed by H2O or alcohol; used as a brominating agent [HAW93] [MER06] [CER91]

Uses

Phosphorus(V) bromide, is used in organic chemistry to convert carboxylic acids to acyl bromides

Uses

Brominating agent for converting organic acids to acyl bromides.

General Description

A yellow crystalline solid that is shipped in sealed containers. Strongly irritating to skin and eyes. Used to make other chemicals.

Reactivity Profile

PHOSPHORUS PENTABROMIDE is a yellow crystalline compound, toxic and corrosive. Contact with water or steam leads to violent decomposition (hydrolysis) producing toxic and corrosive phosphoryl bromide fumes. When heated to decomposition PHOSPHORUS PENTABROMIDE emits toxic fumes of bromide and oxides of phosphorus [Lewis, 3rd ed., 1993, p. 1033].

Health Hazard

CORROSIVE and/or TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Fire will produce irritating, corrosive and/or toxic gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Contact with molten substance may cause severe burns to skin and eyes. Runoff from fire control or dilution water may cause pollution.

Fire Hazard

EXCEPT FOR ACETIC ANHYDRIDE (UN1715), THAT IS FLAMMABLE, some of these materials may burn, but none ignite readily. May ignite combustibles (wood, paper, oil, clothing, etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. 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.

Purification Methods

Dissolve it in pure nitrobenzene at 60o, filtering off any insoluble residue on to sintered glass funnel, then allow it to crystallise by cooling. Wash the collected solid with dry Et2O and remove excess ether in a current of dry N2. (All manipulations should be performed in a dry-box.) [Harris & Payne J Chem Soc 3732 1958]. It fumes in moist air because of hydrolysis. HARMFUL VAPOURS (wash burning eyes with aqueous NaHCO3).

PHOSPHORUS PENTABROMIDE(7789-69-7)Related Product Information

• Phosphorus pentoxide
• Glutaric acid
• Glutaraldehyde
• TUNGSTEN(VI) CHLORIDE
• Carbon disulfide
• Phosphorus trichloride
• Carbon tetrachloride
• Phosphorus pentachloride
• Sodium bicarbonate
• Sulfur hexafluoride
• Potassium oxide
• Selenium dioxide
• Orthophosphorus acid
• Aluminum dihydrogen phosphate
• FERROUS SULFATE
• Phosphorus tribromide
• PHOSPHORUS PENTABROMIDE