IPCS INCHEM Home
SODIUM SULFITE
(powder)
ICSC: 1200
Peer-Review Status: 03.04.2009 Validated
Sodium sulphite
Sulfurous acid, disodium salt
Disodium sulfite 
CAS #: 7757-83-7 RTECS #: WE2150000
EINECS #: 231-821-4
    Formula: Na2SO3
Molecular mass: 126.04

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE   PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!   
Inhalation Cough. Sore throat. See Effects of long-term or repeated exposure.  Use local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Seek medical attention if you feel unwell. 
Skin   Protective clothing. Protective gloves.  Remove contaminated clothes. Rinse skin with plenty of water or shower. 
Eyes   Wear safety spectacles.  Rinse with plenty of water (remove contact lenses if easily possible). 
Ingestion   Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Give one or two glasses of water to drink. Rest. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: filter respirator for inorganic gases and vapours adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.   
EC Classification
 
UN Classification
 
GHS Classification
Signal: Danger
Harmful if swallowed
May cause allergy or asthma symptoms or breathing difficulties if inhaled
May cause an allergic skin reaction
Harmful to aquatic life 
excl mark;warncancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
  Separated from strong oxidants and acids. Store in an area without drain or sewer access. 

IMPORTANT DATA
Physical State; Appearance
WHITE CRYSTALS OR POWDER. 

Physical dangers
No data. 

Chemical dangers
Decomposes on heating. This produces toxic and corrosive fumes. The substance is a strong reducing agent. It reacts violently with oxidants. Reacts with strong acids. This produces toxic sulfur oxides. 

Occupational exposure limits
TLV not established.
MAK (not established):. 

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

Inhalation risk
A nuisance-causing concentration of airborne particles can be reached quickly when dispersed. 

Effects of short-term exposure
The aerosol is irritating to the respiratory tract. 

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation may cause asthma. See Notes. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Melting point: >500°C
Decomposes at 600°C
Density: 2.63 g/cm³
Solubility in water, g/100ml at 20°C: 22 (good)
Octanol/water partition coefficient as log Pow: -4  
The substance is harmful to aquatic organisms. 

NOTES
The symptoms of asthma often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential.
Immediate administration of an appropriate inhalation therapy by a doctor, or by an authorized person, should be considered.
Anyone who has shown symptoms of asthma due to this substance should avoid all further contact. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations
       Sodium sulfite (FAO Nutrition Meetings Report Series 40abc)
       SODIUM SULFITE (JECFA Evaluation)