Sodium hydrogensulfite solution
Sodium metabisulfite solution
NaHO3S
ICSC # 1134
CAS # 7631-90-5
RTECS # VZ2000000
UN # 2693
EC # 016-064-00-8
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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.
Gives off irritating or toxic fumes (or gases) in a fire.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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Exposure
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•Inhalation
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Ventilation.
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Fresh air, rest.
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•Skin
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Protective gloves.
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Rinse skin with plenty of water or shower.
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•Eyes
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Safety spectacles
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First rinse with plenty of water (remove contact lenses if easily possible).
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•Ingestion
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Abdominal pain.
Vomiting.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Give one or two glasses of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Collect leaking liquid in covered plastic containers.
Absorb remaining liquid in sand or inert absorbent and remove to safe place.
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Separated from
acids
and
strong oxidants,
food and feedstuffs.
Well closed.
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Do not transport with food and feedstuffs.
Note: B
Xn symbol
R: 22-31
S: 2-25-46
UN Hazard Class: 8
UN Packing Group: III
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Important Data
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Physical State; Appearance:
COLOURLESS TO YELLOW LIQUID
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating and
on contact with
acids
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producing sulfur oxides.
Reacts with
acids
and
strong oxidants,
causing fire and explosion hazard.
The substance is a weak acid.
Attacks metal.
Occupational Exposure Limits:
TLV: 5 mg/m3, as TWA; A4 (not classifiable as a human carcinogen); (ACGIH 2005).
MAK not established.
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Routes of Exposure:
The substance can be absorbed into the body
by ingestion
Inhalation Risk:
No indication can be given about the rate in which a harmful concentration of this substance in the air is reached.
Effects of Short-Term Exposure:
The substance may cause asthma-like reactions or urticaria in sensitive persons if ingested.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: 104°C
Melting point: <0°C
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Relative density (water = 1): 1.34
Solubility in water: (miscible)
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Environmental
Data
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This substance may be hazardous in the environment; special attention should be given to water quality.
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N O T E S
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Transport Emergency Card: TEC (R)-80GC1-II+III
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ADDITIONAL INFORMATION
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ICSC: 1134
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SODIUM BISULFITE 38-40 % AQUEOUS SOLUTION
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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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