SODIUM SULFITE ICSC: 1200 Sodium sulphite Sulfurous acid, disodium salt Disodium sulfite Na2O3S / Na2SO3 Molecular mass: 126.06 (powder) ICSC #    1200 CAS #     7757-83-7 RTECS # WE2150000 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! STRICT HYGIENE!  •Inhalation Laboured breathing. Wheezing. Local exhaust or breathing protection. Fresh air, rest. Half-upright position. Refer for medical attention.  •Skin Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •Eyes Face shield or eye protection in combination with breathing protection. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •Ingestion In sensitized individuals minute quantities may lead to serious effects. (Further see Inhalation). Do not eat, drink, or smoke during work. Wash hands before eating. Refer for medical attention. Spillage Disposal Storage Packaging & Labelling Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water. Personal protection: P2 filter respirator for harmful particles. Separated from strong oxidants, acids. Dry. SODIUM SULFITE ICSC: 1200 Important Data Physical State; Appearance: WHITE CRYSTALS OR POWDER. Physical Dangers: Chemical Dangers: The substance decomposes on heating and on burning producing toxic and corrosive fumes ( sulfur oxides ). The substance is a strong reducing agent and reacts with oxidants. Reacts withstrong acidsto produce toxic sulfur dioxide. Occupational Exposure Limits: TLV not established. Routes of Exposure: The substance can be absorbed into the body by inhalation and by ingestion. Inhalation Risk: Effects of Short-Term Exposure: Inhalation of this substance may cause asthma-like reactions. Effects of Long-Term or Repeated Exposure: Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation exposure may cause asthma (see Notes). Physical Properties Decomposes below melting point: at 600°C Relative density (water = 1): 2.63 Solubility in water: good Environmental Data This substance may be hazardous to the environment; special attention should be given to aquatic organisms. N O T E S Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. 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. Anyone who has shown symptoms of asthma due to this substance should avoid all further contact with this substance. Card has been partly updated in April 2005. NFPA Code: H1; F0; R0 ADDITIONAL INFORMATION ICSC: 1200 SODIUM SULFITE (C) IPCS, CEC, 1994 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.