Zinc phosphateCAS#7779-90-0
High Purity and Consistent Quality – Industrial-grade purity of ≥99% ensures reliable performance in coatings, pigments, and corrosion-protection applications.
Excellent Thermal Stability – High melting point (900 °C) and decomposition resistance make it suitable for high-temperature and industrial processing environments.
Superior Chemical Stability – Odorless, stable under normal conditions, with zero vapor pressure at 20 °C, providing safe handling and long shelf life.
Selective Solubility for Versatile Use – Practically insoluble in water and ethanol but soluble in inorganic acids and ammonia, enabling controlled reactivity and broad formulation compatibility.
Product Description of Zinc Phosphate (CAS No. 7779-90-0)
Zinc Phosphate is a high-purity industrial chemical with a minimum content of 99%. It appears as a white, odorless crystalline powder with excellent thermal and chemical stability. The compound has a melting point of approximately 900 °C and decomposes upon boiling. It exhibits zero vapor pressure at 20 °C and a relative density of 3.99 at the same temperature.
Zinc Phosphate is practically insoluble in water and ethanol, while it readily dissolves in inorganic acids and ammonia solutions. Under normal storage and handling conditions, it remains stable, though it should be kept away from strong acids and alkalis due to incompatibility.
Parameters
| Melting point | 900 °C (lit.) |
| density | 4.0 g/mL (lit.) |
| vapor pressure | 0Pa at 20℃ |
| solubility | H2O: insoluble(lit.) |
| form | Powder |
| color | White |
| Odor | Odorless |
| Water Solubility | Insoluble in water |
| Merck | 1410151 |
| Solubility Product Constant (Ksp) | pKsp: 32.04 |
| InChI | InChI=1S/2H3O4P.3Zn/c2*1-5(2,3)4;;;/h2*(H3,1,2,3,4);;;/q;;3*+2/p-6 |
| InChIKey | LRXTYHSAJDENHV-UHFFFAOYSA-H |
| SMILES | [Zn+2].[Zn+2].[Zn+2].P([O-])([O-])([O-])=O.P([O-])([O-])([O-])=O |
| CAS DataBase Reference | 7779-90-0(CAS DataBase Reference) |
| EPA Substance Registry System | Trizinc phosphate (7779-90-0) |
Safety Information
| Hazard Codes | N |
| Risk Statements | 50/53 |
| Safety Statements | 60-61 |
| RIDADR | UN 3077 9/PG 3 |
| WGK Germany | 2 |
| RTECS | TD0590000 |
| TSCA | Yes |
| HazardClass | 9 |
| PackingGroup | III |
| Toxicity | LD50 intraperitoneal in mouse: 552mg/kg |
Product Application of Zinc Phosphate (CAS No. 7779-90-0)
Zinc Phosphate is widely used as a key anticorrosion pigment in protective coating systems, often in combination with barium metaborate and strontium chromate. It is commonly incorporated into thin wash-primer and corrosion-inhibiting primer formulations, where phosphate or chromate pigments are dispersed in synthetic polymer binders such as vinyl chloride copolymers to provide effective surface protection and long-term corrosion resistance.
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