Sulfurous acid, monoammonium salt
Ammonium hydrogen sulfite
H5NO3S/NH4HSO3
Molecular mass: 99.1
ICSC # 1254
CAS # 10192-30-0
RTECS # WT3595000
UN # 2693 (bisulfites, aqueous solution)
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Not combustible.
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In case of fire in the surroundings: all extinguishing agents allowed.
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Explosion
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Exposure
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•Inhalation
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Ventilation (not if powder), local exhaust, or breathing protection.
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•Skin
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Protective gloves.
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•Eyes
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Safety spectacles.
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•Ingestion
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Do not eat, drink, or smoke during work.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting.
Wash away remainder with plenty of water
(extra personal protection: P2 filter respirator for harmful particles).
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Separated from
strong oxidants,
acids,
food and feedstuffs.
Well closed.
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Do not transport with food and feedstuffs.
UN Hazard Class: 8
UN Packing Group: III
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Important Data
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Physical State; Appearance:
COLOURLESS TO YELLOW CRYSTALS.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating or
on contact with acids
producing toxic fumes including sulfur oxides, nitrogen oxides and ammonia.
Reacts violently with oxidants.
Attacks many metals in presence of water at high concentration.
Occupational Exposure Limits:
TLV not established.
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Routes of 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 Short-Term Exposure:
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Decomposes below boiling point at 150°C
Relative density (water = 1): 2.0
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Solubility in water, g/100 ml at 10°C: 267
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Environmental
Data
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N O T E S
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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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ADDITIONAL INFORMATION
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ICSC: 1254
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AMMMONIUM BISULFITE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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