Sulfates
Zinc sulfate
At room temperature, it is colorless or white rhombic crystal or powder, astringent, soluble in water, acidic in aqueous solution, slightly soluble in ethanol and glycerol. Pure zinc sulfate in the air for a long time unchanged yellow, placed in dry air to lose water into a white powder.
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Ferrous sulfate
Gray and turquoise single monoclinic system crystalline powder or granule. Inodorous, taste salty. Easily airslake in dry air, it is easy to oxidize to brown yellow alkalescence ferric sulphate. Soluble in water, insoluble in ethanol.
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Potassium Sulfate
It is white crystalline powder. It is heavy and hard. No smell. Soluble in water (12g/100ml water at 25℃, 24.1g/100ml water at 100℃), insoluble in alcohol, acetone and carbon disulfide. It has a bitter and salty taste.
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Calcium Sulfate
This product is white powder; Odorless, tasteless. This product is slightly soluble in water and insoluble in ethanol.
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