CAS 2101-88-4 appears in our catalog under these names: 1-azido-4-bromobenzene, 1-AZIDO-4-BROMOBENZENE SOLUTION, 1-Azido-4-bromobenzene ~0.5M solution in t-butyl methyl ether. Offered by: Fluorochem, Sigma-Aldrich, Biosynth. Available pack sizes: 1g, 10ML, 5ml, 25ml.