Description General description Phosphorus tribromide (PBr3) is commonly used in Hell-Volhard-Zelinsky halogenation for the a-bromination of carboxylic acids to form the corresponding acyl bromide. It is also useful for the conversion of primary and secondary alcohols to alkyl bromides.[1][2] Application Phosphorus tribromide may be used as a reagent: • In a novel protocol for synthesizing 7-ethoxy-1-(p-ethylphenoxy)-3,7-dimethyl-2-octene, a synthetic juvenile hormone mimic of trans,trans,cis-10,11-epoxy-7-ethyl-3,11-dimethyltrideca-2,6-dienoate.[3] • To synthesize 1,2,3-diazaphosphinane, 1,2,3-thiazaphosphinine and 1,2-azaphosphole bearing a chromone ring.[4] Packaging 100, 500 g in Sure/Seal™