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SODIUM BISULFITE 38-40 % AQUEOUS SOLUTIONICSC: 1134
Sodium acid sulfite
Sodium sulhydrate
Sodium hydrogensulfite aqueous solution
Sodium metabisulfite aqueous solution
Monosodium sulfite
Leucogen
Hydrogen sulfite sodium
Sulfurous acid, monosodium salt
May 2018
CAS #: 7631-90-5
EC Number: 231-548-0

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.  Risk of fire and explosion on contact with acids or oxidants.  NO contact with acids or strong oxidizing agents.  NO contact with incompatible materials: See Chemical Dangers  In case of fire in the surroundings, use appropriate extinguishing media.   

   
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Shortness of breath. Wheezing.  Use ventilation.  Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. 
Skin Redness.  Protective gloves.  Rinse skin with plenty of water or shower. 
Eyes Redness.  Wear safety spectacles.  Rinse with plenty of water for several minutes (remove contact lenses if easily possible). 
Ingestion Abdominal pain. Nausea. Vomiting.  Do not eat, drink, or smoke during work.  Rinse mouth. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: filter respirator for acid gases and vapours adapted to the airborne concentration of the substance. Collect leaking and spilled liquid in covered non-metallic containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Wash away remainder with plenty of water. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

excl mark;warn
WARNING
Harmful if swallowed 

Transportation
UN Classification
 

STORAGE
Separated from acids, strong oxidants and food and feedstuffs. Well closed. 
PACKAGING
Do not transport with food and feedstuffs. 
SODIUM BISULFITE 38-40 % AQUEOUS SOLUTION ICSC: 1134
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-YELLOW LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
Decomposes on heating and on contact with acids. This produces sulfur oxides. Reacts with acids and strong oxidants. This generates fire hazard. The substance is a weak acid. Attacks metals. 

Formula: NaHO3S/NaHSO3
Molecular mass: 104.06
Boiling point: 104°C
Melting point: <-5°C
Relative density (water = 1): 1.34
Vapour pressure, kPa at 20°C: 2.4
Viscosity: 3.64 mPa*s at 20°C 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by ingestion. 

Effects of short-term exposure
The substance is irritating to the skin, eyes, respiratory tract and gastrointestinal tract. Exposure could cause asthma-like reactions or urticaria in sensitive persons. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached. 

Effects of long-term or repeated exposure
Repeated or prolonged inhalation may cause asthma-like symptoms. The substance may have effects on the skin. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 5 mg/m3, as TWA; A4 (not classifiable as a human carcinogen) 

ENVIRONMENT
This substance may be hazardous to the environment. Special attention should be given to water quality. 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xn; R: 22-31; S: (2)-25-46; Note: B 

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    See Also:
       Toxicological Abbreviations