SODIUM DISULFITE 1461
October 2002
Disodium disulfite
CAS No: 7681-57-4
Disodium pyrosulfite
RTECS No: UX8225000
Sodium metabisulfite
EC No: 016-063-00-2
Na2O5S2
Molecular mass: 190.1
TYPES OF
ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/FIRE FIGHTING
HAZARD/
EXPOSURE
Not combustible. In case of fire in the surroundings:
FIRE
use appropriate extinguishing
media.
EXPLOSION
EXPOSURE PREVENT DISPERSION OF DUST!
Cough. Wheezing. Local exhaust or breathing Fresh air, rest.
Inhalation
protection.
Protective gloves. First rinse with plenty of water, then
Skin
remove contaminated clothes and
rinse again.
Redness. Pain. Safety goggles. First rinse with plenty of water for
Eyes
several minutes (remove contact
lenses if easily possible), then take
to a doctor.
Abdominal pain. Diarrhoea. Do not eat, drink, or smoke during Rinse mouth. Give plenty of water
Ingestion
Nausea. Vomiting. work. to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Do NOT absorb in saw-dust or other combustible Xn Symbol
absorbents. Sweep spilled substance into R: 22-31-41
containers; if appropriate, moisten first to prevent S: (2-)26-39-46
dusting. (Extra personal protection: P2 filter
respirator for harmful particles.) Do NOT let this
chemical enter the environment.
EMERGENCY RESPONSE STORAGE
Separated from acids, and strong oxidants.
Prepared in the context of cooperation between the International
IPCS Programme on Chemical Safety and the European Commission
International 漏 IPCS 2002
Programme on
Chemical Safety SEE IMPORTANT INFORMATION ON THE BACK.
1461 SODIUM DISULFITE
IMPORTANT DATA
Physical State; Appearance Routes of exposure
WHITE POWDER The substance can be absorbed into the body by inhalation and
by ingestion.
Chemical dangers
Inhalation risk
The substance decomposes on heating producing sulfur oxides.
The substance is a strong reducing agent and reacts with Evaporation at 20掳C is negligible; a harmful concentration of
oxidants. Reacts violently with concentrated solution of sodium airborne particles can, however, be reached quickly when
nitrite. The substance decomposes on contact with acids dispersed.
producing sulfur oxides.
Effects of short-term exposure
Occupational exposure limits The substance is irritating to the eyes, the respiratory tract and
TLV: 5 mg/m3 as TWA; A4; (ACGIH 2002). is severely irritating to gastrointestinal tract. Inhalation of the
substance may cause asthma-like reactions.
PHYSICAL PROPERTIES
Decomposes below melting point at 150掳C Solubility in water, g/100 ml: 54 (good)
Density: 1.4 g/cm3 Octanol/water partition coefficient as log Pow: -3.7
ENVIRONMENTAL DATA
The substance is harmful to aquatic organisms.
NOTES
Rinse contaminated clothes (fire hazard) with plenty of water.
Anyone who has shown symptoms of asthma due to this substance should avoid all further contact.
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.
ADDITIONAL INFORMATION
Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible
LEGAL NOTICE for the use which might be made of this information
漏IPCS 2002
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