Specifications molecular formula: FeSO4(NH4)2SO4.6H2OAppearance:Light yellow powder molecular formula: FeSO4(NH4)2SO4.6H2OAppearance:Light yellow powder Properties: A soil white or yellowish powder, namely into a brown liquid. Soluble in water and alcohol. Anhydrous ferric density for 3.097 g/cm ^ 3. Become acidic aqueous solution, heating through 480 °C when decompose, release sulphur trioxide become trioxide iron, avoid light, moistureproof, sealing preservation. Use: As an analytical reagent, sugar to quantitatively measure, iron catalyst, mordant DTC system pigment, drugs. Details: Test item Specification Reagent grade Pharmaceutical grade Appearance Conform Conform Assay /% ≥99.5 ≥99.0 Water insoluble /% ≤0.005 ≤0.02 Chloride (Cl)/% ≤0.001 ≤0.005 Phosphate (PO4)/% ≤0.0005 ≤0.002 Manganese (Mn)/% ≤0.05 Ferric (Fe)/% ≤0.01 ≤0.02 Copper (Cu)/% ≤0.002 ≤0.01 Zinc (Zn)/% ≤0.005 ≤0.02 Lead (Pb)/% ≤0.002 ≤0.004 SO4/% ≤0.1 ≤0.2