Sulfurous acid, monoammonium salt Ammonium hydrogen sulfite
CAS #: 10192-30-0
UN #: 2693 (bisulfites, aqueous solution)
EC Number: 233-469-7
FIRE & EXPLOSION
In case of fire in the surroundings, use appropriate extinguishing media.
Use ventilation (not if powder), local exhaust or breathing protection.
Wear safety spectacles.
Do not eat, drink, or smoke during work.
CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water.
According to UN GHS Criteria
Transportation UN Classification
UN Hazard Class: 8; UN Pack Group: III
Separated from strong oxidants, acids and food and feedstuffs. Well closed.
Chemical dangers Decomposes on heating and on contact with acids. This produces toxic fumes including sulfur oxides, nitrogen oxides and ammonia. Reacts violently with oxidants. Attacks many metals in the presence of water.
Molecular mass: 99.1
Decomposes at 150°C Relative density (water = 1): 2.0 Solubility in water, g/100ml at 10°C: 267
EXPOSURE & HEALTH EFFECTS
Routes of exposure
Effects of short-term exposure
Inhalation risk Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed, especially if powdered.
Effects of long-term or repeated exposure
OCCUPATIONAL EXPOSURE LIMITS
Mainly sold as aqueous solution. Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken.
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