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Boron tribromide, BBr3, is a colorless, fuming liquid compound containing boron and bromine. It is decomposed by water and alcohols
B 1981 (OTTO) Boron tribromide, ≥99.9% Cas 10294-33-4 - used to cleave aryl methyl ethers in a synthesis of a benzopyranobenzopyran from a coumarin scaffold.