Molekula
Hydroxylamine-O-sulfonic acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Hydroxylamine-O-sulfonic acid is a reactive inorganic compound used in organic synthesis, particularly in the preparation of hydroxylamine derivatives and as a reducing agent. It is a white crystalline solid with the molecular formula H2NOSO3H and a molecular weight of 113.09 g/mol. It must be stored at 2 to 8 °C and is classified as dangerous. Molekula supplies Hydroxylamine-O-sulfonic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
On backorder — expected to ship by 25 November 2026
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
-
100 g — £61.80 per pack ex VAT · £74.16 inc. VAT
-
200 g — £115.00 per pack ex VAT · £138.00 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Off-white crystalline powder |
| Water | ≤0.5% |
| Assay | ≥97.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 77461217 |
| CAS Number | 2950-43-8 |
| IUPAC Name | amino hydrogen sulfate |
| EC Number | 220-971-6 |
| Molecular Formula | H2NOSO3H |
| Molecular Weight | 113.09 |
| Exact Mass | 112.9783 |
| SMILES | NOS(=O)(=O)O |
| InChIKey | DQPBABKTKYNPMH-UHFFFAOYSA-N |
| InChI | InChI=1S/H3NO4S/c1-5-6(2,3)4/h1H2,(H,2,3,4) |
| PubChem CID | 76284 |
| UN Number | UN3260 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28111961 |
| Tariff Code | 2811198090 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
-
Hazardous to the Environment
GHS09
Hazard statements
- H290 May be corrosive to metals
- H302 Harmful if swallowed
- H314 Causes severe skin burns and eye damage
- H317 May cause an allergic skin reaction
- H351 Suspected of causing cancer
- H400 Very toxic to aquatic life
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
We haven't published a Safety Data Sheet for this product yet. Ask us and we'll send you one.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- Amidoperoxymonosulfuric acid
- Amidosulfonic peracid
- Aminomonopersulfuric acid
- HAOS
- Hydroxylamine-O-sulphonic acid
- Hydroxylaminesulfonic acid
- Permonosulfamic acid
- Sulfamic acid N-oxide
- Sulfoperamidic acid
- Sulfuric acid, monoazanyl ester
Frequently asked questions
What is Hydroxylamine-O-sulfonic acid used for?
It is primarily used as a reducing agent in organic synthesis and as a reagent in the production of dyes and pharmaceuticals.
What is the chemical formula and molecular weight of Hydroxylamine-O-sulfonic acid?
The formula is H2NOSO3H and the molecular weight is 113.09 g/mol.
How should Hydroxylamine-O-sulfonic acid be stored?
It should be stored at temperatures between 2 to 8 °C and protected from light and moisture.
What grade is available for Hydroxylamine-O-sulfonic acid?
It is available in technical grade; specific higher grades may be available upon request.
Can Molekula supply Hydroxylamine-O-sulfonic acid in bulk?
Yes, Molekula can supply Hydroxylamine-O-sulfonic acid in bulk quantities—please contact us for pricing and availability.
What documentation comes with an order of Hydroxylamine-O-sulfonic acid?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.