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Date of Issue : Feb 2002 1. IDENTIFICATION
General Product Name : SODIUM SILICATE Other Names : SILICATE OF SODA UN No. : N/A Dangerous Goods Class : None Allocated Subsidiary Risk : None Allocated Hazchem Code : N/A Pack Group : 0 EPG : N/A Poisons Schedule : N/A Uses : Catalysts and silica gels, soaps and detergents, adhesives (especially sealing and laminating paper board containers), water treatment, ore treatment, soil solidification, glass foam, bleaching and sizing of textiles and paper pulp, pigments, drilling fluids, binder for abrasive wheels, foundry cores and moulds, waterproofing mortars and cements, flame retardant, chemical equipment lining, enhanced oil recovery.
1.1 Physical Description / Properties
Appearance : White fine, hygroscopic granules, odourless. Formula : Na4O4Si Boiling Point : N/A deg C Melting Point : N/A deg C Vapour Pressure : N/A Specific Gravity : N/A (water = 1) Flash Point : N/A pH : 11.5 (1% soln) Solubility in water : N/A 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
Solubility in water = Prtly soluble. Bulk density = 650 - 950 kg/m3 1.3 Ingredients
2. HEALTH HAZARD INFORMATION
2.1 Health Effects - Acute Swallowed
Ingestion causes pain in mouth and throat and irritation to the mucous membranes. Eye
Severely irritating. Risk of serious damage to eyes. Eye contact causes irritation and pain, possibly resulting in permanent injury and/or loss of vision. Skin
Irritating to skin. Skin contact in combination with humidity can cause irritation and pain. Inhaled
Irritating to respiratory system. Inhalation of dust can cause pain in nose and throat, sneezing and coughing and irritation to the mucous membranes. 2.2 Health Effects - Chronic
Dissolution in water results in a liquid of pH approx 11-13 chich is corrosive to eyes and irritating to skin. Toxic effects of the product are caused by the alkalinity and not by substance specific systemic effects.
2.3 First Aid
Swallowed
Only when conscious, rinse mouth, give plenty of water to drink (approx 500 ml). DO NOT induce vomiting. Seek medical advice.
Eye
Thoroughly rinse immediately with water for a minimum fo 15 minutes. Eyelids should be held away from the eyeball to ensure thorough rinsing. Always seek medical attention.
Skin
Remove all contaminated clothing immediately. Wash off with plenty of soap and water. Seek medical advice if irritation develops. Launder clothes before reuse.
Inhaled
In all cases of doubt, or when symptoms persist, seek medical attention. Move to fresh air, rest, half upright position, loosen clothing. Seek medical advice if irritation develops.
First Aid Facilities
Ensure an eye bath and safety shower available and ready for use.
2.5 Advice to Doctor
Treat symptomatically based on individual reactions of patient and judgement of doctor. Eye injury required an immediate and thorough rinsing with water. Contact an eye specialist.
2.6 Toxicity Data
Oral (rat) LD50: 1300-2200 mg/kg. The LD50 value is therefore of no practical significance due to the corrosive nature of the product.
3. PRECAUTIONS FOR USE
3.1 Exposure Standards
Sodium silicate OES - TWA = 5.0 mg/m3 (respirable dust).
3.2 Engineering Controls
Working areas and methods should be organized in such a way that direct contact is avoided. Avoid generating dusts. Areas in which handling generates dusts should have adequate ventilation equipment to minimze exposure to personnel.
3.3 Personal Protection
Respiratpry protection - in case of dust formation use suitable respiratory equipmnet (respirator with filter P2). Skin protection - wear protective gloves and suitable clothing. Eye protection - wear tightly fitting safety goggles.
3.4 Flammability
Not combustible. SAFE HANDLING INFORMATION
4.1 Storage / Transport
The product is hygroscopic and may form lumps. Store in a dry and cool place. Keep the original package or container closed when not in use. Avoid light metal and its alloys, galvanised material. Avoid contact with humidity and carbon dioxide. Avoid contact with certain metals (e.g aluminium, tin, zinc and their alloys).
4.2 Packaging / Labelling UN No. N/A Class None Allocated Sub Risk None Allocated Hazchem Code N/A Pack Group 0 EPG No. N/A Shipping Name SODIUM SILICATE Hazard IRRITANT
Risk Phrases R37/38 Irritating to respiratory system and skin. R41 Risk of serious damage to eyes.
Safety Phrases S22 Do not breathe dust. S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 Wear suitable protective clothing, gloves and eye/face protection.
4.3 Spills and Disposal
Spills
Clean up personnel should wear full protective clothing including respiratory protection. Do not allow spilled material to enter drains or water courses. In case of large spillages, contact the local authority.
Collect as much spilled material as possible in a clean container for (preferable) reuse or disposal. Flush remainder with water.
Disposal
Dispose according to all local, state, and federal regulations. Empty containers which cannot be cleaned should be disposed of in the same manner as the product.
4.4 FIRE AND EXPLOSION HAZARD Fire / Explosion
Not combustible. Corrosive sodium oxide vapours may be generated at high temperatures. Avoid contain with certain metals (e.g aluminium, tin, zinc and their alloys). Can generate hydrogen gas, which can form explosive mixtures with air. Avoid contact with acids. Avoid contact with humidity and carbon dioxide.
Extinguishing Media
Firefighters should wear full protective clothing including self contained breathing apparatus. Use extinguishing media suitable to surrounding fire conditions. 5 OTHER INFORMATION
Other Information
LC50 96h (Brachydanio rerio, OECD no 203) = 3185 mg/l (Mol. ratio 3.36, conc. 35%, pH 10.1) EC50 48h (Daphnia magna) = 4857 mg/l (Mol. ratio 3.2, conc. 35%) ECO 48h (Bacteria) = > 1000 mg/l (conc. 35%, pH 7.9) Degradation abiotic - In an aqueous solution of pH = < 9 the silicate is mineralised and precipitated. The maximum concentration of soluble silicates, at this pH, is 120 mg/l. Degradation biotic - not applicable (in organic product) The pH rise is responisble for the environment effect on the aquatic life. If not neitralised, this product can be toxic for aquatic organism because of its alkalinity. pH > 9 has a corrosive effect on fish (possibly causing death). pH > 8.5 will result in destruction of algae.
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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