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Date of Issue : Feb 2002 1. IDENTIFICATION
General Product Name : SODIUM TRIPOLYPHOSPHATE Other Names : STPP ; SODIUM TRIPHOSPHATE, TRIPOLY PENTASODIUM TRIPHOSPHATE 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 : In water softening (calcium and magnesium hardness is sequestered from solution without precipitation); peptising agent, emulsifier and dispersing agent, ingredient of cleansers in drilling fluids to control mud viscosity in oil fields; to preserve meat.
1.1 Physical Description / Properties
Appearance : White slightly hygroscopic powder or granules. Formula : Na5P3O10 Boiling Point : 1000 deg C Melting Point : 622 deg C Vapour Pressure : N/A Specific Gravity : >1.5 (water = 1) Flash Point : N/A pH : 9.5 - 10.0 (1% soln) Solubility in water : 150 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
With prolonged heating of STPP solutions, it tends to revert to the ortho- phosphate. More stable than the higher (ie. meta-) phosphates, but less stable than tetrasodium pyrophosphate. Bulk density = 0.58 - 0.75 g/cm3 Water insolubility = max 0.05% 1.3 Ingredients
2. HEALTH HAZARD INFORMATION
2.1 Health Effects - Acute Swallowed
If ingested in large amounts, nausea, vomiting and diarrhoea are probable. Moderately toxic by ingestion. Poisoning may affect the blood calcium level. Eye
Dusts may be irritating to the eyes. Skin
Prolonged contact may be irritating. Slightly toxic by skin absorption. Inhaled
Burning sensation to nose, throat and eye. May cause sneezing and coughing. 2.2 Health Effects - Chronic
No significant health effects could be found.
2.3 First Aid
Swallowed
If conscious, immediately give 2 - 4 glasses of water and induce vomiting by touching finger to back of throat. Call a physician.
Eye
Immediately flush with plenty of water for at least 15 minutes. Obtain medical attention.
Skin
Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. If effects occur/persist seek medical attention.
Inhaled
Remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen, obtain medical attention.
First Aid Facilities
Ensure an eye bath and safety shower are available and ready for use.
2.5 Advice to Doctor
Phosphates are laxatives. Treat symptomatically based on judgement of doctor and individual reactions of patient.
2.6 Toxicity Data
Oral LD50 = 4100 mg/kg (Rat) ; 3210 mg/kg (Mouse) Dermal LD50 = >7940 mg/kg (Rabbit) Subcutaneous LD50 = 2060 mg/kg (Rat) This material is not considered to be a carcinogen or mutagen. No reproductive effects habe been identified.
3. PRECAUTIONS FOR USE
3.1 Exposure Standards
No exposure limit has been established for this product, however the following is recommended for nuisance dust : TWA = 10 mg/m3.
3.2 Engineering Controls
Provide local mechanical ventilation capable of maintaining dust emissions at a minimum level.
3.3 Personal Protection
Respiratory - if use conditions generate dusts, wear an approved respirator appropriate for those emission levels. Appropriate respirators may be a full face piece or a half mask air-purifying cartridge respirator with particulate filters, a self-contained breathing apparatus in the pressure demand mode, or a supplied-air respirator. Hands - wear rubber gloves. Eyes - wear chemical safety goggles unless a full face piece respirator is worn. Skin - wear protective clothing with rubber boots. Avoid breathing dust. Wash hands and face thoroughly after handling and before work breaks, eating, drinking, smoking and using toilet facilities.
3.4 Flammability
Material is non flammable. SAFE HANDLING INFORMATION
4.1 Storage / Transport
Store in a cool, dry well-ventilated place away from incompatible materials. Keep bags dry at al times. Prolonged storage may cause product to cake and become wet from atmospheric moisture.
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 TRIPOLYPHOSPHATE Hazard
Risk Phrases
Safety Phrases
4.3 Spills and Disposal
Spills
Clean up personnel should wear full protective clothiing including breathing apparatus suitable to dust conditions. Avoid raising dust. Keep material out of sewers, storm drains, surface waters and soil.
Sweep up and shovel material with a minimum of dusting into approved waste disposal containers for later disposal. Move containers from spill area. Cautiously wash spill residues with plenty of water.
Disposal
Dispose of contaminated product and material used in cleaning up spills or leak in a manner approved for this material by Local, State and Federal regulations. Empty containers can have residues, gases and mists and are subject to proper waste disposal as above.
4.4 FIRE AND EXPLOSION HAZARD Fire / Explosion
Material is stable under normal conditions of use. Aqueous solutions react with aluminium and liberate hydrogen. Fire may produce irritating or poisonous gases. Solutions are midly corrosive to aluminium and galvanised steel.
Extinguishing Media
Fire-fighters should wear full protective clothing including self-contained breathing apparatus. Use dry chemical, carbon dioxide, water spray or foam type extinguishers. Use water spray to cool nearby containers and structures exposed to fire. 5 OTHER INFORMATION
Other Information
Keep material out of sewers, storm drains, surface waters and soil. Phosphate will promote algae growth and may degrade water quality.
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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