Used for quantitative analysis of nitrates. ||Synonyms:|Iron II Sulfate Heptahydrate||CAS No:|7782-63-0||Molecular Formula:|FeSO4•7H2O||Molecular Weight:|278.02||Appearance:|Bluish geen crystals||Purity:|≥99%||Melting Point:|65°C (approx.)||pH:|3-4 (25°C, 50g/L)||Density:|1.898g/ml at 25°C (lit.)||Insoluble Matter:|≤0.01%||Calcium:|≤0.005%||Chloride:|≤0.001%||Copper:|≤0.005%||Ferric Ion (Fe3+):|≤0.1%||Magnesium:|≤0.002%||Manganese:|≤0.05%||Phosphate:|≤0.001%||Potassium:|≤0.002%||Sodium:|≤0.002%||Zinc:|≤0.005%||Substance not precipitated by NH4OH:|≤0.05||Solubility (20%):|Green colored clear solution||Storage and Stability:|May be stored at RT.||Warning:|Irritant! Moisture sensitive!||Meets or exceeds ACS Specifications