... Formula C11H16F6N5OP 3.Use:Pharmaceutical Intermediates Specifications1-Hydroxy-7-azabenzotriazole(HOAT)CAS No.: 39968-33-7Molecular Formula C11H16F6N5OPStructural Formula Molecular Weight ... : 3.36%Use:Pharmaceutical Intermediates, Other. 1-Hydroxy-7-azabenzotriazole(HOAT)