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SODIUM SULFITE ICSC: 1200
Date of Peer Review: October 1994

Sodium sulphite
Sulfurous acid, disodium salt
Disodium sulfite
(powder)
CAS # 7757-83-7 Na2O3S / Na2SO3
RTECS # WE2150000 Molecular mass: 126.06
UN #
EC #
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 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.
EU Classification
UN Classification

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H1; F0; R0
Separated from strong oxidants, acids. Dry.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2004

SEE IMPORTANT INFORMATION ON BACK


SODIUM SULFITE ICSC: 1200
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
WHITE CRYSTALS OR POWDER.

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 with strong acids to 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.

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 600C
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.
NOTES
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.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2004