Hydroxylamine solution , 50wt.%inH2O , 7803-49-8

Synonym(s):
HDA

CAS NO.：7803-49-8

Empirical Formula: H3NO

Molecular Weight: 33.03

MDL number: MFCD00044522

EINECS: 232-259-2

PRODUCT Properties

• Melting point: 7°C
• Boiling point: >100 °C
• Density: 1.078 g/mL at 25 °C
• vapor pressure: 9 mm Hg ( 40 °C)
• refractive index: n20/D 1.393
• RTECS: NC2975000
• storage temp.: Store below +30°C.
• solubility: Water
• form: white flakes or needles
• pka: pK (20°) 7.97
• color: white orthorhombic flakes or needles
• Water Solubility: Miscible with water, liquid ammonia and methanol. Slightly miscible with ether, benzene, carbon disulfide and chloroform.
• Merck: 13,4853
• Stability: Stable. Incompatible with oxidizing agents, potassium dichromate, chromium trioxide, zinc, calcium, copper, sodium, ammonia, carbonyls, phosphorus halides, pyridine, hypochlorites.
• InChIKey: AVXURJPOCDRRFD-UHFFFAOYSA-N
• CAS DataBase Reference: 7803-49-8(CAS DataBase Reference)
• NIST Chemistry Reference: Hydroxylamine(7803-49-8)
• EPA Substance Registry System: Hydroxylamine (7803-49-8)

Description and Uses

Hydroxylamine was first synthesized by Wilhem Clemens Lossen in 1865 in the laboratory of Wilhelm Heinrich Heintz while working in Halle. The Lossen synthesis originally generated hydroxylamine in aqueous solution. Anhydrous hydroxylamine was prepared later by Lobry de Bruyn and Crismer in 1891. The free base is extremely volatile, and industrial-scale production has been fraught with problems, including large explosions at facilities in the United States and Japan. Much of the hydroxylamine produced and transported is in salt form or as a dilute aqueous solution.

Reducing agent used in photographic processing, leather tanning, manufacturing of nylon and other polymers; as a stabilizer for natural rubber; to prevent the development of objectionable tastes and odors during the refining of fatty materials.

Safety

• Symbol(GHS): GHS02,GHS05,GHS07,GHS08,GHS09
• Signal word: Danger
• Hazard statements: H208-H290-H302-H315-H317-H318-H335-H351-H373-H400
• Precautionary statements: P210-P212-P230-P233-P280-P305+P351+P338-P371+P380+P375-P501
• Hazard Codes: Xn,N
• Risk Statements: 5-22-37/38-41-43-48/22-50-40-21/22
• Safety Statements: 23-26-36/37/39-47-61-22-46
• RIDADR: UN 3082 9/PG 3
• WGK Germany: 3
• F: 4.8
• TSCA: Yes
• HazardClass: 8
• PackingGroup: II
• HS Code: 28251090
• Hazardous Substances Data: 7803-49-8(Hazardous Substances Data)
• Toxicity: LD50 i.p. in mice: 1.83 mmol/kg (Smith, Layne)