ICSC 1717 - SODIUM DITHIONITE

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SODIUM DITHIONITE	ICSC: 1717 (April 2008)
Sodium hydrosulfite Sodium hypodisulfite Disodium hydrosulfite Sodium hyposulfite

CAS #: 7775-14-6

UN #: 1384

EC Number: 231-890-0

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Combustible. Gives off irritating or toxic fumes (or gases) in a fire.	NO open flames. NO contact with combustible substances or water.	Use carbon dioxide, dry sand, special powder, water in large amounts.

PREVENT DISPERSION OF DUST!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Sore throat.	Use local exhaust or breathing protection.	Fresh air, rest. Seek medical attention if you feel unwell.
Skin		Protective gloves.	Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes	Redness. Pain.	Wear safety goggles.	Rinse with plenty of water (remove contact lenses if easily possible). Refer for medical attention.
Ingestion	Nausea. Abdominal pain. Vomiting. Diarrhoea.	Do not eat, drink, or smoke during work.	Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink.

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. Sweep spilled substance into covered containers. Carefully collect remainder. Then store and dispose of according to local regulations. Do NOT absorb in saw-dust or other combustible absorbents.	According to UN GHS Criteria WARNING Self-heating in large quantities; may catch fire. May be harmful if swallowed Causes eye irritation Harmful to aquatic life Transportation UN Classification UN Hazard Class: 4.2; UN Pack Group: II
STORAGE
Dry. Well closed. Separated from strong oxidants and acids. Store in an area without drain or sewer access.
PACKAGING

SODIUM DITHIONITE

ICSC: 1717

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance WHITE CRYSTALLINE POWDER. Physical dangers Chemical dangers Decomposes above 100°C . This produces toxic fumes including sulfur oxides. The substance is a strong reducing agent. It reacts with oxidants. Decomposes on contact with acids. This produces toxic gases. Contact with water, moisture and moist air may cause spontaneous ignition.	Formula: Na₂S₂O₄ Molecular mass: 174.1 Decomposes at >100°C Density: 2.4 g/m³ Solubility in water, g/100ml at 20°C: 25 (moderate) Flash point: >100°C o.c. Octanol/water partition coefficient as log Pow: <-4.7

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
WHITE CRYSTALLINE POWDER.

Physical dangers

Chemical dangers
Decomposes above 100°C . This produces toxic fumes including sulfur oxides. The substance is a strong reducing agent. It reacts with oxidants. Decomposes on contact with acids. This produces toxic gases. Contact with water, moisture and moist air may cause spontaneous ignition.

Formula: Na₂S₂O₄
Molecular mass: 174.1
Decomposes at >100°C
Density: 2.4 g/m³
Solubility in water, g/100ml at 20°C: 25 (moderate)
Flash point: >100°C o.c.
Octanol/water partition coefficient as log Pow: <-4.7

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by ingestion. Effects of short-term exposure The substance is irritating to the eyes and respiratory tract.	Inhalation risk A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the eyes and respiratory tract.

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered.

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS

ENVIRONMENT
The substance is harmful to aquatic organisms.

NOTES

ADDITIONAL INFORMATION

EC Classification
Symbol: Xn; R: 7-22-31; S: (2)-7/8-26-28-43

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