Bromine dioxide is the chemical compound composed of bromine and oxygen with the formula BrO2. It forms unstable yellow to yellow-orange crystals. It was first isolated by R. Schwarz and M. Schmeißer in 1937 and is hypothesized to be important in the atmospheric reaction of bromine with ozone. It is similar to chlorine dioxide, the dioxide of its halogen neighbor one period higher on the periodic table.

CAS：21255-83-4
中文别名：
英文别名：Ethryn;Eryprim;erypar;pfizer-e;erythrocin Stearate;meberyt;BrO2 radical;ethril;Wemid;oe7;qidmycin;Dioxido-λ⁵-bromanyl;eratrex;Bristamycin;
分子式：BrO2
分子量：111.903
精确质量：110.908
Psa：17.07
Logp：0.608