Dried Ferrous Sulphate with 86.0% to 89.0% Assay is primarily used for the erection and assembling of any chemical plant. Dried Ferrous Sulphate is available in greyish white to buff coloured powder form. Dried Ferrous Sulphate contains 86.0% to 89.0% assay content. Dried Ferrous Sulphate with 86.0% to 89.0% Assay is slowly soluble in water, highly soluble in boiling water and practically insoluble in ethanol [96%].