Hydroxylamine-O-sulfonic Acid

• CAT Number: R020349
• CAS Number: 2950-43-8
• Molecular Formula: H3NO4S
• Molecular Weight: 113.09
• Purity: ≥95%
• Synonyms: Amidoperoxymonosulfuric Acid (HOS(O)2ONH2); Amidosulfonic Peracid; Aminomonopersulfuric Acid; Ammonia-N-oxide-O-sulfonic Acid Betaine; HAOS; O-Sulfohydroxylamine; Hydroxylaminesulfonic Acid; Permonosulfamic Acid; Sulfoperamidic Acid; Sulfuric Acid Mo
• Storage: -20°C
• IUPAC Name: amino hydrogen sulfate
• InChI: InChI=1S/H3NO4S/c1-5-6(2,3)4/h1H2,(H,2,3,4)
• InChIKey: DQPBABKTKYNPMH-UHFFFAOYSA-N
• SMILES: NOS(=O)(=O)O

Hydroxylamine-O-sulfonic acid (Cat No.: R020349) is a crystalline, water-soluble compound with the formula NH₂OSO₃H. It acts as a versatile reagent in organic and inorganic synthesis, particularly useful for introducing amino and hydroxylamine groups. HOSA serves as a mild oxidizing agent and is employed in the conversion of ketones to oximes and in the synthesis of hydrazines, azides, and heterocycles. Its unique reactivity and stability make it valuable in the preparation of pharmaceuticals, agrochemicals, and dyes under controlled, often aqueous, conditions.