Amines REACH

Hydroxylamine

CAS Number
7803-49-8
EC Number
232-259-2

What is Hydroxylamine?

Hydroxylamine (CAS 7803-49-8), also known as azanol, is an inorganic amine used industrially as a reducing agent, oxime-forming reagent and pH buffer.

Where is Hydroxylamine used?

  • Pharmaceutical synthesis: intermediate for oximes, caprolactam and active pharmaceutical ingredients
  • Agrochemicals: synthesis of herbicides and fungicides
  • Textile and paper processing: reducing agent that strips dyes and controls oxidative degradation during bleaching
  • Rubber: stabilizer and vulcanization auxiliary that moderates cure rates in specialty elastomer formulations
  • It is commercially available as aqueous solutions or as its stable salt forms.

Good to know: Technical and reagent grades are most commonly stocked; pharmaceutical-grade material meets USP, Ph. Eur. specifications.

Commercial specifications

  • Stabilized aqueous solutions, typically 50% concentration
  • Solid salt forms: hydroxylamine hydrochloride and hydroxylamine sulfate
  • Packaging: drums to IBC totes, depending on grade and concentration

Other Names (Synonyms)

nitrinous acid|azanol|aminol|NH2OH|azinous acid|2FP81O2L9Z|RefChem:5894

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What are the physical properties of Hydroxylamine?

Melting Point 33 °C
Boiling Point 70 °C @ Press: 60 Torr
Density 1.227 g/cm³
Appearance slightly yellow liquid
Color white orthorhombic flakes or needles
Form white flakes or needles
Water Solubility Miscible with water, liquid ammonia and methanol. Slightly miscible with ether, benzene, carbon disulfide and chloroform.
Vapor Pressure 9 mm Hg ( 40 °C)
Refractive Index n 20/D 1.393
pH 10.6 (20°C in H2O)

How is Hydroxylamine classified and handled safely? Learn More

Danger
GHS01· Explosive GHS05· Corrosive GHS07· Irritant GHS08· Health Hazard GHS09· Environmental Hazard

Hazard Statements

H200 Unstable Explosive
H290 May be corrosive to metals
H302 Harmful if swallowed
H312 Harmful in contact with skin

Precautionary Statements

P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P203 Obtain, consult and follow expert instructions for use.
P234 Keep only in original packaging.

Which trade and regulatory codes apply to Hydroxylamine?

HS Code 28251090
UN Number 3082
ADR Class 9
Packing Group III
Storage Class 3 - Flammable liquids
WGK (Germany) 3
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