Phosphorus oxybromide has similar toxicity to phosphorus oxychloride. Reacts with water and emits irritating and corrosive hydrogen bromide gas in the form of white smoke, which is highly irritating to eyes, mucous membranes and skin. Patients who have inhaled vapor or smoke should be removed from the contaminated area, placed to rest and kept warm. If your eyes are irritated, rinse with water. If severe, seek medical treatment. In case of skin contact, rinse with water first, then wash with soap. If burns occur, seek medical attention. If swallowed by mistake, rinse your mouth immediately and send to hospital for treatment immediately.
Uses
Used as an intermediate in chemical processing and as a raw material for brominated flame retardants
Production method
Trichloroxy The phosphorus method uses phosphorus oxychloride as the raw material and aluminum trichloride as the catalyst. It is heated at a temperature of about 80°C and hydrogen bromide gas is introduced for reaction to produce phosphorus oxybromide.
The hydrogen chloride gas generated by the reaction is absorbed by water to generate dilute hydrochloric acid.
Phosphorus tribromide method: In a round-bottomed flask equipped with a ground-mouth reflux condenser, add a mixture of phosphorus pentabromide and phosphorus pentoxide (250gPBr5/about 30gP2O5), and slowly heat to 150°C , hydroxybutyl pentaacrylate diphosphorus oxide is slightly excess stoichiometrically than phosphorus pentabromide. At this time, while paying attention to driving out the bromine, the reaction should be completed within 5 hours. Then, 10g of bromine and an equivalent amount of phosphorus pentoxide were added to the melt, and the antioxidant 1010 was recirculated at 150°C for several hours. This is because the oxidation of the intermediate product phosphorus tribromide to phosphorus pentabromide and the transformation to phosphorus oxybromide take time. The product was vacuum distilled under reduced pressure. After removing the bromine and the contained phosphorus tribromide from the initial distillate, it is captured. The receiver was cooled with ice-cold saline.
