Overview
Hydroxylamine sulfate (CAS 10039-54-0 ), also known as hydroxylammonium sulfate or HAS, is a stable, solid salt form of hydroxylamine used across chemical synthesis, surface treatment, and formulation industries.
It functions primarily as a reducing agent, chemical intermediate, and antioxidant stabilizer in manufacturing processes where controlled reactivity is required. In personal care and cosmetics, HAS acts as a pH adjuster.
It serves as an antioxidant stabilizer in hair color formulations and skin-lightening products. Agricultural chemical synthesis relies on it as a key intermediate in the production of oximes, which are precursors to herbicides.
These oximes are essential for the creation of various pesticides. Textile and leather processing operations use it for fiber treatment and as a reducing agent in dye stripping and surface preparation during manufacturing.
Pharmaceutical manufacturers employ HAS in the synthesis of active intermediates, particularly in oxime-based reaction pathways. Hydroxylamine sulfate is supplied as a white crystalline powder or granule for industrial use.
It is available in technical grade for industrial synthesis applications and in higher-purity grades suitable for pharmaceutical and cosmetic manufacturing. Standard packaging ranges from small drums to bulk quantities.
Moisture-controlled packaging is required to maintain product stability during storage and transit. This ensures the chemical integrity of the material remains consistent for all high-precision industrial and laboratory applications.
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Physical Properties
| Melting Point | 120 °C (decomp) |
| Boiling Point | 56.5°C |
| Density | 1.88 g/cm³ |
| Appearance | white crystals or powder |
| Color | White |
| Form | Crystals |
| Water Solubility | 329 g/L (20 ºC) |
| Vapor Pressure | 0.001Pa at 20℃ |
| pH | 3.6 (10g/l, H2O, 20℃) |
| Log P | -1.031 (est) |
Safety & Handling
Warning GHS05 GHS07 GHS08 GHS09 Hazard Statements H290 May be corrosive to metals H302 Harmful if swallowed H312 Harmful in contact with skin H315 Causes skin irritation H317 May cause an allergic skin reaction H319 Causes serious eye irritation H351 Suspected of causing cancer H370 Causes damage to organs H371 May cause damage to organs H372 Causes damage to organs through prolonged or repeated exposure H373 May causes damage to organs through prolonged or repeated exposure H400 Very toxic to aquatic life H412 Harmful to aquatic life with long lasting effects H302+H312 Harmful if swallowed or in contact with skin Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P234 Keep only in original packaging. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P317 Get emergency medical help. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P390 Absorb spillage to prevent material damage. P391 Collect spillage. P405 Store locked up. P406 Store in a corrosion-resistant/… container with a resistant inner liner. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P308+P316 Get emergency medical help immediately. P332+P317 Get emergency medical help. P333+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 28251000 |
| UN Number | 2865 |
| ADR Class | 8 |
| Packing Group | III |
| Storage Class | 4.1A - Other explosive hazardous materials |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 10039-54-0
- EC Number
- 233-118-8
- Mol. Weight
- 164.14
- HS Code
- 28251000
- Category
- Salts & Minerals