Ferrous Ammonium Sulfate Hexahydrate, Reagent A.C.S.

Assay:98.5-101.5%
Fe(NH4)2(SO4)2 · 6H2O
MAXIMUM ALLOWABLE 
Insoluble matter: 0.01%
Phosphate (PO4): 0.003%
Calcium (Ca): 0.005%
Copper (Cu): 0.003%
Magnesium (Mg): 0.002%
Manganese (Mn): 0.01%
Potassium (K): 0.002%
Sodium (Na): 0.02%
Zinc (Zn): 0.003%
Ferric ion (Fe3+): 0.01%
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