Alprazolam is a benzodiazepine (ben-zoe-dye-AZE-eh-peen). Alprazolam affects chemicals in the brain that may be unbalanced in people with anxiety. Alprazolam is used to treat anxiety disorders, panic disorders, and anxiety caused by depression. Alprazolam powder treats anxiety, panic disorder, insomnia (trouble sleeping), and anxiety caused by depression. CAS No: 28981-97-7 MF: C17H13ClN4 Synonyms: 8-chloro-1-methyl-6-phenyl-4h-1,2,4-triazolo(3,4-a)(1,4)benzodiazepine Appearance: White powder Assay: 99% MW: 308.76