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Phosphorus oxybromide

Chemical properties Toxicity Application Preparation Category Flammability and Hazardous characteristics Storage characteristics warehouse Fire extinguishing agent
Phosphorus oxybromide
Phosphorus oxybromide structure
Chemical Name:
Phosphorus oxybromide
POBr3;7789-59-5;AURORA KA-1088;Formylmelphalan;PHOSPHORYL BROMIDE;Phosphorictribromide;phosphoryltribromide;Phosphorus(V) oxybro;Phosphorus(V) oxybroM;Phosphoryl tribromide
Molecular Formula:
Formula Weight:
MOL File:

Phosphorus oxybromide Properties

Melting point:
56 °C(lit.)
Boiling point:
192 °C(lit.)
2.82 g/mL at 25 °C(lit.)
Flash point:
storage temp. 
Store below +30°C.
Specific Gravity
White to yellow
Water Solubility 
Moisture Sensitive
CAS DataBase Reference
7789-59-5(CAS DataBase Reference)
NIST Chemistry Reference
Phosphorus tribromide oxide(7789-59-5)
EPA Substance Registry System
Phosphoric tribromide (7789-59-5)
  • Risk and Safety Statements
Signal word  Danger
Hazard statements  H318-H314
Precautionary statements  P280-P305+P351+P338-P310-P260h-P301+P330+P331-P303+P361+P353-P405-P501a
Hazard Codes  C
Risk Statements  14-34-37
Safety Statements  26-36/37/39-43-45-7/8-Neverusewater.
RIDADR  UN 1939 8/PG 2
WGK Germany  3
Hazard Note  Corrosive
HazardClass  8
PackingGroup  II
HS Code  28129090
NFPA 704
3 2

Phosphorus oxybromide price More Price(13)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 8.21026 Phosphoryl bromide for synthesis 7789-59-5 25 g $160.95 2021-03-22 Buy
Sigma-Aldrich 8.21026 Phosphoryl bromide for synthesis. CAS 7789-59-5, EC Number 232-177-7, chemical formula POBr ., for synthesis 7789-59-5 8210260025 $168 2020-08-18 Buy
Sigma-Aldrich 376949 Phosphorus(V) oxybromide >95% 7789-59-5 25g $198 2021-03-22 Buy
Sigma-Aldrich 8.21026 Phosphoryl bromide for synthesis 7789-59-5 100 g $277.5 2021-03-22 Buy
Sigma-Aldrich 8.21026 Phosphoryl bromide for synthesis 7789-59-5 1 kg $856.55 2021-03-22 Buy

Phosphorus oxybromide Chemical Properties,Uses,Production

Chemical properties

It appears as colorless or pale orange crystal with irritating odor. It has a relative density of 2.822, melting temperature of 56 °C, the boiling point of 191.7 ℃ and the evaporation heat of 38 Kj/mol. It is soluble in ether, benzene, chloroform, carbon disulfide, concentrated sulfuric acid. It can be slowly hydrolyzed to phosphoric acid and HBr in water.


It has similar toxicity to the phosphorus oxychloride. It can react with water, emitting a white smoke-like, irritant and corrosive hydrogen bromide gas which has strong irritation to the eyes, mucous membranes and skin. The patients having inhaled of the vapor or smoke should be sent away from the contaminated area for rest and keeping warm. If eyes are irritated, rinse with water. Upon severe cases, send for medical treatment. Upon skin contact, first rinse with water, and then thoroughly wash with soap. If burned, go for medical treatment. Upon mistakenly administration, immediately gargle and immediately go to the hospital for treatment.


During the chemical process, it can be used as an intermediate and used as the raw materials for manufacturing the bromine flame retardant.


Phosphorus oxychloride method: take phosphorus oxychloride as raw material and aluminum trichloride as the catalyst, upon heating at about 80 ℃, introduce hydrogen bromide gas for reaction, generating tribromo phosphorus. The reaction is:
POC13 + 3HBr → POBr3 + 3HCl ↑
The produced hydrogen chloride gas during the reaction, after being absorbed by water, can produce dilute hydrochloric acid.
Phosphorus tribromide method: to a round bottom flask equipped with a reflow condenser, add the mixture of phosphorus pentabromide and phosphorus pentoxide (250 g of PBr5/about 30 g of P2O5) and heat slowly to 150 ° C. Phosphorus pentoxide is a bit more than the phosphorus pentabromide in stoichiometry. At this time, one the one hand, pay attention to expel the bromine out; on the other hand, make sure that the reaction is completed within 5h.
Then, 10 g of bromine and equivalent amount of phosphorus pentoxide were added to the melt and refluxed at 150 ° C for several hours. This is because it takes time for the intermediate product, phosphorus tribromide, to be oxidized to phosphorus pentabromide and transited to tribromonic phosphorus. The resultant was subjected to vacuum distillation under reduced pressure. After removing the initial distillate and the phosphorus tribromide contained therein, the trapping was carried out. The receiver is cooled with ice brine to generate tribromo phosphorus. Its reaction is:
3PBr5 + P2O5 → 5POBr3


corrosive items

Flammability and Hazardous characteristics

It is subject to decomposition upon coming across water, generating toxic hydrogen bromide gas.

Storage characteristics warehouse

ventilated, low temperature and dry; it should be stored separately from combustible product.

Fire extinguishing agent

Dry powder

Chemical Properties

colorless to grey-brown crystals or fused mass

General Description

A colorless crystalline solid or liquid if heated above 133° F with a pungent odor. Phosphorus oxybromide is commonly heated and shipped in a molten state. Soluble in water, but, decomposed by water to hydrobromic and phosphoric acid with evolution of heat. Reacts with organic materials to cause fire. Evolves highly toxic and corrosive gases when exposed to fire. Corrosive to metals and tissue. Used to make other chemicals.

Reactivity Profile

Phosphorus oxybromide is incompatible with water, strong oxidizing agents, alcohols, bases, including amines. May react vigorously or explosively if mixed with diisopropyl ether or other ethers in the presence of trace amounts of metal salts [J. Haz. Mat., 1981, 4, 291].

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.

Safety Profile

Poison by ingestion, inhalation, and shin contact. A corrosive irritant to skin, eyes, and mucous membranes. A corrosive material. Reacts with steam, water to produce much heat with toxic fumes. When heated to decomposition it emits very toxic fumes of Brand POx. See also BROMIDES.

Phosphorus oxybromide Preparation Products And Raw materials

Raw materials

Preparation Products

Phosphorus oxybromide Suppliers

Global( 185)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Springchem New Material Technology Co.,Limited
+8613917661608 +86-021-62885108 China 2065 57
Capot Chemical Co.,Ltd.
+86(0)13336195806 +86-571-85586718
+86-571-85864795 China 20010 60
Anhui Royal Chemical Co., Ltd.
+86-025-86655873 CHINA 536 55
career henan chemical co
+86-371-86658258 CHINA 29961 58
Shenzhen Nexconn Pharmatechs Ltd
15013857715 CHINA 3004 58
Hubei Jusheng Technology Co.,Ltd.
027-59599243 CHINA 28229 58
Hubei xin bonus chemical co. LTD
027-59338440 CHINA 23035 58
Chongqing Chemdad Co., Ltd
+86-13650506873 CHINA 37282 58
0371-55170695 CHINA 26742 58
86-18523575427 CHINA 47496 58

View Lastest Price from Phosphorus oxybromide manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2021-07-20 Phosphorus oxybromide
US $1.00-1.00 / KG 1g 99% 50ton Shaanxi Dideu Medichem Co. Ltd
2019-07-06 Phosphorus oxybromide
US $1.00 / KG 1G 99% 100kg career henan chemical co

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