Iron(III) phosphate hydrate (FePO4•xH2O)-Powder

Characteristic

Iron(III) phosphate, also ferric phosphate, is the inorganic compound with the formula FePO4. Several related materials are known, including four polymorphs of FePO₄ and two polymorphs of the dihydrate FePO4·(H2O)2. These materials find several technical applications as well as occurring in the mineral kingdom.

Chemical formula:FePO₄

Molar mass:150.815 g/mol (anhydrous)

Appearance:yellow-brown solid

Density:3.056 g/cm³ (anhydrous);2.87 g/cm³ (20 °C, dihydrate)

Melting point:250 °C (482 °F; 523 K)(dihydrate) decomposes

Solubility in water:anhydrous:insoluble

                           dihydrate:0.642 g/100 mL (100 °C)

Magnetic susceptibility (χ):+11,500.0·10−6 cm3/mol

Application

Iron phosphate supported on MCM-41 is used in the partial oxidation of methane into methanol, formaldehyde and dimethyl ether. It is involved in the oxidative dehydrogenation of isobutyric acid.