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F A -0 0 0 -1 4 7 9 Sumiden Wire Products Corporation (SWPC) <br />2 21 <br />Ferrous Sulfate Heptahydrate <br />X <br />Ferrous Sulfate Crystals, Irritant, Corrosive Solids <br />Used in pharmaceutical, agricultural and waste water application for heavy metal extraction, mining and fertilizer. <br />1 <br />(b) (1) (2) <br />Used or reused as an ingredient in an industrial process <br />to make a product <br />X <br />392.6