ICSC 1138 - SODIUM THIOSULFATE

SODIUM THIOSULFATE	ICSC: 1138 (June 2006)
Disodium thiosulfate Thiosulfuric acid, disodium salt Sodium hyposulfit

CAS #: 7772-98-7

EC Number: 231-867-5

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
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.


	SYMPTOMS	PREVENTION	FIRST AID
Inhalation		Avoid inhalation of dust.	Fresh air, rest.
Skin			Rinse and then wash skin with water and soap.
Eyes	Redness.	Wear safety goggles.	Rinse with plenty of water for several minutes (remove contact lenses if easily possible).
Ingestion		Do not eat, drink, or smoke during work.	Rinse mouth.

SPILLAGE DISPOSAL	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
STORAGE
Separated from strong oxidants.
PACKAGING

SODIUM THIOSULFATE

ICSC: 1138

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS CRYSTALS. Physical dangers Chemical dangers Decomposes on heating. This produces toxic fumes including sulfur oxides. Reacts violently with strong oxidants.	Formula: Na₂O₃S₂ 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)

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS CRYSTALS.

Physical dangers

Chemical dangers
Decomposes on heating. This produces toxic fumes including sulfur oxides. Reacts violently with strong oxidants.

Formula: Na₂O₃S₂
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

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

ENVIRONMENT

NOTES

ADDITIONAL INFORMATION

EC Classification

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    See Also:
       Toxicological Abbreviations
       SODIUM THIOSULFATE (JECFA Evaluation)