ICSC 1461 - SODIUM DISULFITE

SODIUM DISULFITE	ICSC: 1461 (November 2002)
Disodium disulfite Disodium pyrosulfite Sodium metabisulfite

CAS #: 7681-57-4

EC Number: 231-673-0

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Not combustible.		In case of fire in the surroundings, use appropriate extinguishing media.

PREVENT DISPERSION OF DUST!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Wheezing.	Use local exhaust or breathing protection.	Fresh air, rest.
Skin		Protective gloves.	First rinse with plenty of water for at least 15 minutes, then remove contaminated clothes and rinse again.
Eyes	Redness. Pain.	Wear safety goggles.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion	Abdominal pain. Diarrhoea. Nausea. Vomiting.	Do not eat, drink, or smoke during work.	Rinse mouth. Give one or two glasses of water to drink. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Do NOT absorb in saw-dust or other combustible absorbents. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting.	According to UN GHS Criteria Transportation UN Classification
STORAGE
Separated from acids and strong oxidants.
PACKAGING

SODIUM DISULFITE

ICSC: 1461

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance WHITE POWDER. Physical dangers Chemical dangers Decomposes on heating. This produces sulfur oxides. The substance is a strong reducing agent. It reacts violently with oxidants. Reacts violently with concentrated solution of sodium nitrite. Decomposes on contact with acids. This produces sulfur oxides.	Formula: Na₂O₅S₂ Molecular mass: 190.1 Decomposes at 150°C Density: 1.4 g/cm³ Solubility in water, g/100ml at ml°C: 54 (good) Octanol/water partition coefficient as log Pow: -3.7

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
WHITE POWDER.

Physical dangers

Chemical dangers
Decomposes on heating. This produces sulfur oxides. The substance is a strong reducing agent. It reacts violently with oxidants. Reacts violently with concentrated solution of sodium nitrite. Decomposes on contact with acids. This produces sulfur oxides.

Formula: Na₂O₅S₂
Molecular mass: 190.1
Decomposes at 150°C
Density: 1.4 g/cm³
Solubility in water, g/100ml at ml°C: 54 (good)
Octanol/water partition coefficient as log Pow: -3.7

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation and by ingestion. Effects of short-term exposure The substance is severely irritating to the gastrointestinal tract. The substance is irritating to the eyes and respiratory tract. Inhalation may cause asthma-like reactions.	Inhalation risk Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation and by ingestion.

Effects of short-term exposure
The substance is severely irritating to the gastrointestinal tract. The substance is irritating to the eyes and respiratory tract. Inhalation may cause asthma-like reactions.

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS
TLV: 5 mg/m³, as TWA; A4 (not classifiable as a human carcinogen)

ENVIRONMENT
The substance is harmful to aquatic organisms.

NOTES
Rinse contaminated clothing with plenty of water because of fire hazard. 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

EC Classification
Symbol: Xn; R: 22-31-41; S: (2)-26-39-46

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    See Also:
       Toxicological Abbreviations