ICSC 1461 - SODIUM METABISULFITE

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SODIUM METABISULFITE	ICSC: 1461 (December 2022)
Disodium disulfite Disodium pyrosulfite Sodium disulfite Pyrosulfite

CAS #: 7681-57-4

UN #: 1759

EC Number: 231-673-0

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. Risk of fire and explosion on contact with acids or oxidants.	NO contact with acids or strong oxidizing agents. NO contact with incompatible materials: See Chemical Dangers	In case of fire in the surroundings, use appropriate extinguishing media.

PREVENT DISPERSION OF DUST!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Shortness of breath. Wheezing.	Use ventilation.	Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
Skin	Redness.	Protective gloves.	Rinse skin with plenty of water or shower.
Eyes	Redness. Burning sensation. Pain.	Wear safety goggles.	Rinse with plenty of water for several minutes (remove contact lenses if easily possible). Refer for medical attention.
Ingestion	Abdominal pain. Nausea. Vomiting.	Do not eat, drink, or smoke during work.	Rinse mouth. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: filter respirator for acid gases and vapours adapted to the airborne concentration of the substance. Collect leaking and spilled liquid in covered non-metallic containers as far as possible. Absorb liquid in sand or inert absorbent. Wash away remainder with plenty of water. Then store and dispose of according to local regulations.	According to UN GHS Criteria Harmful if swallowed Causes serious eye damage Harmful to aquatic life Transportation UN Classification UN Hazard Class: 8; UN Pack Group: I, II, III
STORAGE
Separated from acids, strong oxidants and food and feedstuffs. Well closed.
PACKAGING

SODIUM METABISULFITE

ICSC: 1461

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance WHITE POWDER WITH CHARACTERISTIC ODOUR. Physical dangers Chemical dangers Decomposes on heating and on contact with acids. This produces sulfur oxides. The substance is a strong reducing agent. It reacts violently with oxidants. This generates fire hazard. Reacts violently with concentrated solution of sodium nitrite.	Formula: Na₂O₅S₂/Na₂S₂O₅ Molecular mass: 190.1 Decomposes at 150°C Density: 2.36 g/cm³ Solubility in water, g/100ml at 20°C: 65 (good) Octanol/water partition coefficient as log Pow: -3.7

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
WHITE POWDER WITH CHARACTERISTIC ODOUR.

Physical dangers

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

Formula: Na₂O₅S₂/Na₂S₂O₅
Molecular mass: 190.1
Decomposes at 150°C
Density: 2.36 g/cm³
Solubility in water, g/100ml at 20°C: 65 (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 ingestion. Effects of short-term exposure The substance is severely irritating to the eyes. The substance is irritating to the skin, respiratory tract and gastrointestinal tract. Exposure could cause asthma-like reactions or urticaria in sensitive persons.	Inhalation risk Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly , especially if powdered. Effects of long-term or repeated exposure Repeated or prolonged inhalation may cause asthma-like symptoms. The substance may have effects on the skin.

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is severely irritating to the eyes. The substance is irritating to the skin, respiratory tract and gastrointestinal tract. Exposure could cause asthma-like reactions or urticaria in sensitive persons.

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

Effects of long-term or repeated exposure
Repeated or prolonged inhalation may cause asthma-like symptoms. The substance may have effects on the skin.

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. 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. Due to lack of specific data on this substance, the information included in this card was derived by analogy with sodium bisulfite.

NOTES

Rinse contaminated clothing with plenty of water because of fire hazard.
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.
Due to lack of specific data on this substance, the information included in this card was derived by analogy with sodium bisulfite.

ADDITIONAL INFORMATION

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

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