High Purity 98% Trisodium Phosphate CAS 15475-67-9 For Metal Cleaning
| Attribute | Value |
|---|---|
| CAS | 15475-67-9 |
| EINECS | 231-509-8 |
| Appearance | White crystal |
| Crystalline Hydrate | 12 Crystal water |
| Dissolubility | Water soluble |
| PH | 11~12 |
| Chemical Formula | Na3PO4·12H2O |
Industrial grade Trisodium phosphate 98% White crystal for chemical materials.
12 water trisodium CAS 10101-89-0 Industrial 98.5% Na3O4P·12H2O
Molecular formula: Na3PO4·12H2O
Molecular weight: 380.12
- Colorless acicular hexagonal crystal system
- Soluble in water, insoluble in organic solvents
- Relative density 1.62 (20°C)
- Melting point 73.3-76.7°C (decomposition)
- When weathered in dry air, 12 crystalline waters are lost at 100°C to form anhydrous substances (Na3PO4)
- The aqueous solution is alkaline and has a certain corrosive effect on the skin
Used as water softener in:
- Metallurgy, chemical industry, textile, printing and dyeing, paper making, mechanical and electrical industry
- Boiler tube cleaning agent and detergent
- Metal rust prevention agent
- Fuel intermediate desiccant
- Sugar juice purification agent
- Photographic developer
- Fabric mercerizing enhancer
- Rubber milk coagulant
- Dental binder
- Pharmaceutical preparations
Products: Trisodium phosphate/TSP
- Industrial grade (12 crystal water) TSP CAS 10101-89-0 98% Na3O4P 12H2O
- Industrial grade (anhydrous) TSP CAS 7601-54-9 98% Na3O4P
- TSP CAS 7601-54-9 97% Na3O4P
| Items for detecting and analyzing | Standard value % |
|---|---|
| Main content: trisodium phosphate ≥ | 98 |
| Sulphate (as SO4) ≤ | 0.50 |
| Chlorine (as Cl) ≤ | 0.30 |
| Water insoluble ≤ | 0.05 |
| Methyl orange alkalinity (Na2) | 16.5-19.0 |
| Iron (Fe) ≤ | 0.01 |
| Arsenic (as As) ≤ | 0.005 |
| Analysis | Test Method | Standard request |
|---|---|---|
| TSP content % | GB 25565-2010 | ≥97 |
| Water insoluble % | GB 25565-2010 | ≤0.2 |
| pH value (10g/mL) | GB 25565-2010 | 11.5-12.5 |
| Fluoride (as F) ppm | GB 25565-2010 | <50 |
| Arsenic (as As) ppm | GB 25565-2010 | <3 |
| Heavy Metal (as Pb) ppm | GB 25565-2010 | <10 |
| Lead ppm | GB 25565-2010 | <4 |
| Loss on drying % | GB 25565-2010 | <2 |
| P2O5 % | GB 25565-2010 | ≥43 |
After dissolving in water, it forms a high pH environment (pH≈12), which can saponify oils and decompose organic dirt. It is especially suitable for cleaning heavy oil stains, industrial oil stains and polishing paste residues.
Compared with common alkali agents: Its oil-removing ability is better than that of soda ash (Na2CO3), but weaker than that of sodium hydroxide (it needs to be combined with a surfactant to enhance the effect).
After cleaning, a phosphate protective film is formed on the surface of metals (such as steel and aluminum) for short-term rust prevention (it needs to be thoroughly washed with subsequent water to avoid residue).
Prevent the peeled oil stains from reattaching and improve the cleaning efficiency.
- Pre-treatment for electroplating/spraying: Remove grease and oxide layers from the metal surface to enhance the adhesion of the coating
- Mechanical equipment maintenance and cleaning: Cleaning heavily oil-stained components such as engine parts, bearings, and molds
- Pipe descaling: After acid washing (such as hydrochloric acid), neutralize the residual acid solution to prevent corrosion
Common combinations:
- Trisodium dihydrate phosphate + surfactant (such as OP-10) + sodium silicate → low-cost metal cleaner
- Trisodium 12-water phosphate + sodium hexametaphosphate → enhances hard water adaptability and dispersibility
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