Ferrous sulfate heptahydrate | FeH14O11S -
2012-6-28 · Ferrous sulphate heptahydrate also known as Iron (II) Sulphate is a blue green crystal with the formula FeSO4.7H2O. Originally it was known as “green vitriol” or “copperas”. It is soluble in water and melts at 64C. It is produced as a by-product of the pickling of steel.
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