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Date of Issue : OCT 1996 1. IDENTIFICATION
General Product Name : SODIUM HYDROSULPHITE Other Names : SODIUM DITHIONITE ; SODIUM SULFOXYLATE UN No. : 1384 Dangerous Goods Class : 42 Subsidiary Risk : None Allocated Hazchem Code : 2P Pack Group : II EPG : 4A2 Poisons Schedule : N/A Uses : Vat dyeing of fibers anf textiles; stripping agent for dyes; reagent; bleaching sugar, soap, oils, groundwood; oxygen scavenger for synthetic rubbers.
1.1 Physical Description / Properties
Appearance : Light lemon-coloured solid in powder or flake form. Formula : Na2S2O4 Boiling Point : N/A deg C Melting Point : >100 deg C Vapour Pressure : N/A Specific Gravity : 2.5 (water = 1) Flash Point : Test Unknown >100 pH : <7 () Solubility in water : 250 g/l (25 deg C) Flammability Limits (as percentage volume in air) Lower Explosion Limit : N/A Upper Explosion Limit : N/A 1.2 Other Properties
Bulk density @ 20oC : 1250kg/m3 Decomposition temperature = 135 deg C 1.3 Ingredients
2. HEALTH HAZARD INFORMATION
2.1 Health Effects - Acute Swallowed
May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Eye
May cause eye irritation. Skin
May cause skin irritation. Inhaled
May cause respiratory tract irritation. 2.2 Health Effects - Chronic
Material is a sensitiser. Not listed as a carcinogen by ACGIH, IARC, NIOSH, NTP or OSHA.
2.3 First Aid
Swallowed
If victim is conscious and alert, give 1 - 3 cups of milk or water to drink. Seek medical attention immediately.
Eye
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower lids. Seek medical aid immediately.
Skin
Get medical aid if irritation develops or persists. Flush skin with plenty of soap and water.
Inhaled
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
First Aid Facilities
Ensure an eye bath and safety shower are available and ready for use.
2.5 Advice to Doctor
Treat symptomatically based on the judgement of the doctor and individual reactions of the patient.
2.6 Toxicity Data
Oral LD50 = not available Dermal LD50 = not available Inhalation LC50 = not available
3. PRECAUTIONS FOR USE
3.1 Exposure Standards
No exposure limit has been established for this product, however the following level is recommended for nuisance dusts : 10 mg/m3.
3.2 Engineering Controls
Ensure adequate general or local explosion-proof ventilation to maintain exposure levels to acceptable levels.
3.3 Personal Protection
Respiratory - wear an approved respirator. Eyes - wear appropriate protective glasses or chemical safety goggles. Skin - wear appropriate gloves to prevent skin contact. Other - wear appropriate protective clothing to minimise contact with skin. Wash hands and face thoroughly after handling and before eating, drinking, smoking or using toilet facilities.
3.4 Flammability
Flammable solid - spontaneously combustible. SAFE HANDLING INFORMATION
4.1 Storage / Transport
Do not store or transport with sodium nitrite, ammonium nitrite, or sodium nitrate. Open and handle containers with care. Only dry scoops should be used to remove product from drums. Reseal containers after use. Store in a cool, dry area. Store in accordance with all regulations relevant to Class 4.2 Solids.
4.2 Packaging / Labelling UN No. 1384 Class 42 Sun Risk None Allocated Hazchem Code 2P Pack Group II EPG No. 4A2 Shipping Name SODIUM HYDROSULPHITE Hazard HARMFUL
Risk Phrases R7 May cause fire. R22 Harmful if swallowed. R31 Contact with acids liberates toxic gas.
Safety Phrases S7/8 Keep container tightly closed and dry. S26 In case of contact with eyes, rinse immediately with plenty of water and contact a doctor or . S28:SOHYSU After contact with skin, wash immediately with plenty of soap and water. S43:SOHYSU In case of fire use foam, dry chemical or carbon dioxide. DO NOT use water directly on fire.
4.3 Spills and Disposal
Spills
Remove all sources of ignition - NO SMOKING. Wear full protective clothing including self-contained breathing apparatus.
Disposal
Dispose of in accordance with all Local, State and Federal regulations at an approved waste disposal facility.
4.4 FIRE AND EXPLOSION HAZARD Fire / Explosion
Flammable solid. Keep away from heat, sparks and flame. Reacts with water. Stable under normal ambient temperatures and pressures. Avoid mechanical shock, incompatible materials, ignition sources, exposure to air, contact with water. Incompatible with strong oxidising agents, strong acids, air and moisture. Hazardous polymerisation has not been reported. Hazardous decomposition products include carbon monoxide, oxides of sulphur, and carbon dioxide. Decomposition temperature is 135 deg C. Dusts at sufficient concentrations can form explosive mixtures with air. Material will react with water and may release a flammable and/or toxic gas.
Extinguishing Media
Do not use water directly on fire. Use foam, dry chemical, or carbon dioxide type extinguishers. Use media/equipment appropriate to surrounding fire conditions. Fire-fighters should wear full protective clothing including self- contained breathing apparatus. 5 OTHER INFORMATION
Other Information
Environment : inorganic product with strong reducing effect which oxidises in solution due to atmospheric oxygen. In acidic media hydrosulphite decomposes to form mainly sulphur dioxide and sulphur. Bacteria toxicity (DEV-L3) : no inhibitory effect of the dehydrogenase activity at < 20 mg/L. Fish toxicity : LC50 = 10 - 100 mg/L/48h (golden orfe) COD : 210 mg O2/g product
5.1 Contact Points
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The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and we assume no liability resulting from its use.
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