Ferrous Sulfate Heptahydrate, Reagent A.C.S.

Assay:≥99.0%
FeSO4 · 7H2O
MAXIMUM ALLOWABLE 
Insoluble matter: 0.01%
Chloride (Cl): 0.001%
Phosphate (PO4): 0.001%
Calcium (Ca): 0.005%
Copper (Cu): 0.005%
Magnesium (Mg): 0.002%
Manganese (Mn): 0.05%
Potassium (K): 0.002%
Sodium (Na): 0.02%
Zinc (Zn): 0.005%
Ferric ion (Fe3+): 0.1%
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