Disodium thiosulfate Thiosulfuric acid, disodium salt Sodium hyposulfit
CAS #: 7772-98-7
EC Number: 231-867-5
FIRE & EXPLOSION
Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. Risk of explosion on contact with oxidizing agents.
NO contact with oxidizing agents.
In case of fire in the surroundings, use appropriate extinguishing media.
Avoid inhalation of dust.
Fresh air, rest.
Rinse and then wash skin with water and soap.
Wear safety goggles.
Rinse with plenty of water for several minutes (remove contact lenses if easily possible).
Do not eat, drink, or smoke during work.
CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers.
According to UN GHS Criteria
Transportation UN Classification
Separated from strong oxidants.
PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS CRYSTALS.
Chemical dangers Decomposes on heating. This produces toxic fumes including sulfur oxides. Reacts violently with strong oxidants.
Molecular mass: 158.1
Decomposes at 300°C Melting point: 48.5°C Density: 1.7 g/cm³ Solubility in water, g/100ml at 20°C: 20.9 Vapour pressure at 20°C: negligible Octanol/water partition coefficient as log Pow: -4.35 (calculated)
EXPOSURE & HEALTH EFFECTS
Routes of exposure
Effects of short-term exposure
Inhalation risk A nuisance-causing concentration of airborne particles can be reached quickly when dispersed.
Effects of long-term or repeated exposure
OCCUPATIONAL EXPOSURE LIMITS
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