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Iron phosphate (MF: FePO₄·2H₂O, MW: 186.85) is a dihydrate of trivalent iron phosphate. Its chemical name is iron(III) phosphate dihydrate. It typically appears as white, off-white, or pale pink monoclinic crystals or an amorphous powder. It serves as the core precursor for lithium iron phosphate (LiFePO₄), a cathode material in lithium-ion batteries, and is also widely used in the food, feed fortification, ceramics manufacturing, metal surface treatment, and environmental protection sectors, featuring low toxicity, stability, and high bioavailability.
| Item | Specification |
| Melting Point | >250°C |
| Boiling Point | N/A |
| Density | 2.74 g/cm³ (20°C) |
| Flash point | N/A |
| Vapor pressure | 1.41 mmHg at 25°C |
| Solubility | Soluble in dilute hydrochloric acid and dilute sulfuric acid; slightly soluble in nitric acid; insoluble in water, ethanol, and diethyl ether. |
Core Applications in New Energy Lithium Batteries:
Iron Phosphate is used in the production and manufacturing of power batteries, energy storage batteries, and digital lithium batteries.
Feed and Livestock Farming Sector: Ferric phosphate is used as a feed-grade trace element iron additive in livestock, poultry, and aquaculture to supplement iron.
Ceramics and Glass Industry: Iron (III) phosphate dihydrate is used as a coloring agent and flux in ceramic glazes to enhance gloss and texture; used as a decolorizing agent and clarifying agent in glass manufacturing.
Applications in the Chemical Industry: Ferric phosphate is used as a raw material for chemical synthesis catalysts, rust inhibitors, and corrosion inhibitors.
Water Treatment and Environmental Protection: It is used in the purification of industrial wastewater and municipal sewage; it facilitates phosphorus removal, flocculation and sedimentation, and the adsorption of heavy metals, thereby helping to ensure water quality meets regulatory standards.
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