Iron (II) sulfate heptahydrate Analytical Grade ACS 500 g

Assay 99.5%

Appearance Bluish / light green crystals

pH (5% water) 3-4 Chloride (Cl) 0.0005% Iron III (Fe (III)) 0.02% Phosphate (PO4) 0.001%

Organic volatile impurities excluded by production process Passes test Nickel (Ni) 0.005% Calcium (Ca) 0.005% Copper (Cu) 0.001% Chromium (Cr) 0.005%

Substances not precipited by NH4 0.1% Manganese (Mn) 0.05% Magnesium (Mg) 0.008% Sodium (Na) 0.02% Nitrogen (N) compounds 0.001% Potassium (K) 0.002% Arsenic (As) 0.0002% Lead (Pb) 0.0005% Mercury (Hg) 0.0002% Zinc (Zn) 0.005%