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Iron Phosphate

Product Definition

Orthophosphoric iron is actually iron phosphate, which is an alternative name for iron phosphate. The iron phosphate existing in nature is also called vivianite. The iron in iron phosphate is trivalent iron, mostly in the form of dihydrate.

Dihydrate: FePO₄·2H₂O, Anhydrous: FePO₄. It is mainly used for manufacturing lithium iron phosphate battery materials, and can also be used as a catalyst and for manufacturing ceramics, etc. Orthophosphoric iron can also be used as a nutritional fortifier for iron fortification.

Product Attributes

The color of high - purity iron phosphate dihydrate is nearly white or light yellow - white powder. As the water of crystallization is lost, the color gradually turns yellow, and the pure anhydrous substance is a yellow - white powder. When the phosphorus (P) content in iron phosphate dihydrate exceeds the standard, the appearance is gray - white or dark gray - white; when the iron content exceeds the standard, it is dark yellow. If there are a large number of divalent iron or sodium, potassium, sulfate, ammonium ions in iron phosphate, the iron phosphate dihydrate is dark black or gray - white. Tap density: 1.13 - 1.59 g/cm³, loose bulk density 0.75 - 0.97 g/cm³. It is easily soluble in hydrochloric acid when heated, but difficult to dissolve in other acids, and is almost insoluble in water, acetic acid, and alcohol.

Product Standards

rivalent iron content: ≥ 29.0% (dihydrate), ≥ 36.0% (anhydrous)

Divalent iron content: ≤ 10 ppm

Sulfate: ≤ 15 ppm

Ammonium (NH₄⁺): ≤ 15 ppm

Calcium: ≤ 50 ppm

Magnesium: ≤ 50 ppm

Sodium: ≤ 100 ppm

Potassium: ≤ 100 ppm

Copper: ≤ 10 ppm

Cadmium: ≤ 10 ppm

Lead: ≤ 15 ppm

Zinc: ≤ 15 ppm

Tap density: 1.13 - 1.59 g/cm³

Fe:P = 0.97 - 1.02 (iron - phosphorus ratio)

Particle size morphology: Spherical - like

Particle size: D50 ≈ 3 - 5 μm

The particle size distribution range must be within 0.1 μm - 10 μm; the maximum particle size must not be greater than 10 μm.