Zinc dihydrogen phosphate dihydrate
CAS: 13598-37-3
Category: Inorganic phosphate compounds
| Purity | Industrial Grade ≥98%; Technical Grade ≥99%; Reagent Grade ≥99.5% |
| Molecular Formula | Zn(H2PO4)2·2H2O |
| Molecular Weight | 295.40 |
| Appearance | White crystalline powder or colorless to white crystalline granules; odorless; slightly hygroscopic |
| Packaging | 500 g/polyethylene bottle, 1 kg/polyethylene bottle, 25 kg fiber drum with polyethylene liner, or 25 kg kraft paper bag with moisture-proof inner bag |
| Testing Indicators | Appearance — Visual inspection; Identification — FTIR spectroscopy and XRD; Zinc content — EDTA complexometric titration or ICP-OES (ASTM E1097); Phosphate content (P2O5) — Spectrophotometric molybdenum blue method or gravimetric analysis; Purity — ICP-OES/XRF elemental analysis; Moisture content — Loss on drying or Karl Fischer titration (ASTM E203); pH (5% solution) — pH meter; Water-insoluble matter — Gravimetric determination; Heavy metals (Pb, Cd, As, Fe) — ICP-MS or ICP-OES. |
| Storage Notes | Store in a cool, dry, and well-ventilated warehouse. Keep containers tightly sealed to prevent moisture absorption. Protect from direct sunlight and excessive humidity. Keep away from strong alkalis, strong oxidizing agents, and incompatible metals. Use moisture-proof packaging during storage and transportation. |
| Lead Time | 10 days |
Primarily used as a phosphate conversion coating material, metal surface treatment agent, corrosion inhibitor, ceramic binder, catalyst precursor, electroplating additive, specialty glass additive, and intermediate for zinc phosphate formulations. It is widely employed in anti-corrosion primers and metal pretreatment chemicals to improve paint adhesion and corrosion resistance.