Our Regular Products Serial Number Products CAS Number End Use 1 Phenyl Hydrazine 100-63-0 Carvedilol, Ondansetron 2 Phenyl Hydrazine HCl 59-88-1 Carvedilol, Ondansetron 3 4-Sulfonamido Phenyl Hydrazine HCl 27918-19-0 Celecoxib 4 4-Chloro Phenyl Hydrazine HCl 1073-70-7 Carprofen