▁unnecessary ▁because ▁b rom ine ▁is ▁commer cially ▁available ▁and ▁has ▁a ▁long ▁sh elf ▁life . ▁ ▁App lications ▁A ▁wide ▁variety ▁of ▁organ ob rom ine ▁comp ounds ▁are ▁used ▁in ▁industry . ▁Some ▁are ▁prepared ▁from ▁b rom ine ▁and ▁others ▁are ▁prepared ▁from ▁hydro gen ▁b rom ide , ▁which ▁is ▁obtained ▁by ▁burning ▁hydro gen ▁in ▁b rom ine . ▁ ▁Fl ame ▁ret ard ants ▁ ▁B rom in ated ▁fl ame ▁ret ard ants ▁represent ▁a ▁comm od ity ▁of ▁growing ▁importance , ▁and ▁make ▁up ▁the ▁largest ▁commercial ▁use ▁of ▁b rom ine . ▁When ▁the ▁b rom in ated ▁material ▁burn s , ▁the ▁fl ame ▁ret ard ant ▁produces ▁hydro b rom ic ▁acid ▁which ▁inter fer es ▁in ▁the ▁radical ▁chain ▁reaction ▁of ▁the ▁ox id ation ▁reaction ▁of ▁the ▁fire . ▁The ▁mechanism ▁is ▁that ▁the ▁highly ▁re active ▁hydro gen ▁radical s , ▁o xygen ▁radical s , ▁and ▁hydro xy ▁radical s ▁react ▁with ▁hydro b rom ic ▁acid ▁to ▁form ▁less ▁re active ▁b rom ine ▁radical s ▁( i . e ., ▁free ▁b rom ine ▁atoms ). ▁B rom ine ▁atoms ▁may ▁also ▁react ▁directly ▁with ▁other ▁radical s ▁to ▁help ▁terminate ▁the ▁free ▁radical ▁chain - rea ctions ▁that ▁character ise ▁comb ust ion . ▁ ▁To ▁make ▁b rom in ated ▁polym ers ▁and ▁pl ast ics , ▁b rom ine - cont aining ▁comp ounds ▁can ▁be ▁incorpor ated ▁into ▁the ▁polym er