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FERROUS SULPHATE_
FERROUS SULPHATE Ferrous iron (as Fe) content by weight: minimum 19% Sulphur (as S) content by weight: minimum 10.5% Free acid (as H2SO4) content by weight: maximum 1% Ferric iron (as Fe) content by weight: maximum 0.5% Lead (as Pb) content by weight: maximum 0.003% Matter insoluble in water by weight: maximum 1% PH: not less than 3.5 Form: free flowing powder