Description General description Hydroxylamine-O-sulfonic acid is a versatile synthetic reagent. It is widely employed as a nucleophile and as an electrophile in various organic syntheses. It can be synthesized by reacting hydroxylamine sulfate with 30% fuming H2SO4. Application Hydroxylamine-O-sulfonic acid (HOSA) may be employed in the preparation of the following: • monosubstituted and 1,1-disubstituted hydrazines • symmetrically substituted pyrroles • aniline • C-substituted amino derivatives • lactams Hydroxylamine-O-sulfonic acid may be used in the following processes: As a nitrogen transfer reagent for the conversion of aldehydes to nitriles in aqueous medium. Synthesis of N-aminopiperidine (NAPP) by reacting with piperidine. Packaging 5, 25, 100 g in glass bottle