Odorless white crystalline solid.
As reducing agent in photography, in synthetic & analytical chemistry, as antioxidant for fatty acids & soaps hydroxylamine hydrochloride.
Registry Numbers and Inventories.
EC Index Number
Heating may cause an explosion; Harmful; Irritant; Sensitising; Dangerous for the Environment
R 5 22 48/22 37/38 41 43 50
S 26 36/37/39 61
Swiss Giftliste 1
Japan ENCS (MITI)
Boiling point, °C
56 - 57
Vapor pressure, mmHg
179 (25 C)
Vapor density (air=1)
1.227 g/cm3 (20 C)
Solubility in water
1.39 (20 C)
Partition coefficient, pKow
Heat of vaporization
Hazards and Protection.
Protect against physical damage. Store at in cool noncombustible buildings and separate from oxidizing materials.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Avoid inhalation or ingestion of dust. Wear protective clothing including clean overalls, cap, gloves, and goggles. Skin which has been exposed should be washed immediately with soap and water.
Canister type mask recommended unless intense heat necessitates use of self-contained apparatus.
Neutralizing Agents for Acids and Caustics: Sodium bisulfate
Explosive under confinement.
Reaction with zinc or calcium produces explosive bishydroxylamides React vigorously with hypochlorites, pyridine, carbonyls.
Fire Extinguishing Agents: Use extreme caution - material may explode. Use remote extinguishing equipment or unmanned fixed turret and hose nozzles - evacuate area.
Very flammable. Combustion probable.
Nitrogen oxides - toxic fumes - react with water or steam to produce heat and corrosive liquids - can react violently with reducing materials.
Fatal overdose in animals produced seizures, then paralysis of the respiratory muscles and death. Vertigo, headache, and restlessness may also be seen. No data were available to assess the potential effects of exposure to this agent during pregnancy or lactation. <br>Malformations have been seen in rabbits.
Nausea and vomiting may occur.
Fatal overdose in animals produced paralysis of the respiratory muscles, dyspnea, cyanosis, apnea, and death.
Repeated exposures may increase risk of allergic reactions such as eczema to exposed surfaces such as hands and forearms. Dermatitis may occur, and a reddening of hair and exposed skin. It may be irritating or corrosive to the
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
Wash with soap and water immediately.
Flush with water.
USCG CHRIS Code