Hydroxylamine-O-sulfonic acid

羟胺-O-磺酸

Also known as: Amino hydrogen sulfate, Hydroxylamine sulfonic acid, HOSA, HAOS, O-Hydroxylaminesulfonic acid, Sulfamic acid N-oxide, Permonosulfamic acid, Aminomonopersulfuric acid, Amidosulfonic peracid, Sulfoperamidic acid, Hydroxylamino-O-sulfonic acid, o-Hydroxylammoniumsulfonate, (Aminooxy)(hydroxy)sulfane dioxide, MFCD00011604

Hydroxylamine-O-sulfonic acid (CAS 2950-43-8) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula H3NO4S and a molecular weight of 113.093 g/mol. It is also known as Amino hydrogen sulfate, Hydroxylamine sulfonic acid and HOSA. Key properties include a melting point of 210 °C (dec.)(lit.) and a density of 2.0±0.1 g/cm3. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2950-43-8
Jingsj CID: J-3617-7
Molecular Formula: H₃NO₄S
Chinese Name: 羟胺-O-磺酸
Molecular Weight: 113.093 g/mol
Category: Inorganic Chemicals
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	210 °C (dec.)(lit.)
Density	2.0±0.1 g/cm3

GHS Safety & Compliance

CorrosionSignal word: Danger

Frequently Asked Questions

What is the CAS number of Hydroxylamine-O-sulfonic acid?

The CAS number of Hydroxylamine-O-sulfonic acid is 2950-43-8.

What are the molecular formula and molecular weight of Hydroxylamine-O-sulfonic acid?

Hydroxylamine-O-sulfonic acid has molecular formula H3NO4S and molecular weight 113.093 g/mol.

Is Hydroxylamine-O-sulfonic acid hazardous?

Hydroxylamine-O-sulfonic acid has GHS signal word Danger.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Hydroxylamine-O-sulfonic acid (CAS 2950-43-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3617-7 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.