Anhydrous Hydrogen Bromide Anhydrous hydrogen bromide is an irritating, colorless, corrosive gas at standard temperature and pressure. The gas fumes strongly in moist air. Commercial anhydrous hydrogen bromide is available in cylinders as a compressed liquefied gas. Cylinders should be kept away from heat and sunlight during storage. The cylinder delivery tube should never be inserted in a liquid or gas without a vacuum break, check valve or other protective apparatus in the line because suck-back into the cylinder may product an explosion. Anhydrous HBr can be handled with piping materials having adequate corrosion resistance for hydrochloric acid service. Brittle materials should be avoided if the chance of impact damage exists. Anhydrous HBr is used in the preparation of organic bromides and as a catalyst in the controlled oxidation of organic materials and the alkylation and cracking of petroleum products.

Typical Properties of Anhydrous Hydrogen Bromide
Specific gravity of liquid	2.77 (-67°C) (-89°F)
Density of gas	3.5 gm/liter (0°C, 1 atm.) (32°F)
Boiling point	-67°C (1 atm.) (-89°F)
Melting point	-87°C (-125°F)
Solubility	Soluble in water and methanol at 25°C (77°F)