Leaks hydrogen bromide

Leaks of HBr gas are evident from the formation of dense white fumes on contact with the atmosphere. Small leaks can be detected by holding an open container of concentrated ammonium hydroxide near the site of the suspected leak dense white fumes confirm a leak is present. In case of the accidental release of hydrogen bromide gas, such as from a leaking cylinder or associated apparatus, evacuate the area and eliminate the source of the leak if this can be done safely. Remove cylinder to a fume hood or remote area if it cannot be shut off. Full respiratory protection and protective clothing may be required to deal with a hydrogen bromide release. 

Hydrogen bromide is an acid gas and as such can be neutralized with caustic solution. When possible the discharge from a valve leak should be controlled by a flow-limiting valve and piped into a 15 percent solution of sodium hydroxide. Use a trap to prevent reverse flow of the solution to the cylinder valve. 

Leaks of hydrogen bromide will be evident as a white smoke when in contact with moist air. Small leaks are made visible as a white mist by holding an open bottle of ammonium hydroxide in the vicinity of the leak. Also, moistened, blue litmus paper will turn red in the presence of hydrogen bromide. 

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