Assay (iodometric, FeCl₃·6H₂O): 99.0 - 102.0 %

Identity: passes test

Insoluble matter: ≤ 0.01 %

Free chlorine: passes test

Acidic substances: passes test

Nitrate (NO₃): ≤ 0.01 %

Sulfate (SO₄): ≤ 0.01 %

Total nitrogen (N): ≤ 0.001 %

Total phosphorus (as PO₄): ≤ 0.01 %

Heavy metals (as Pb): ≤ 0.005 %

Ca (Calcium): ≤ 0.01 %

Cu (Copper): ≤ 0.003 %

Fe II (Iron II)*: ≤ 0.002 %

K (Potassium): ≤ 0.005 %

Mg (Magnesium): ≤ 0.005 %

Na (Sodium): ≤ 0.05 %

Zn (Zinc): ≤ 0.003 %