Basic introduction to ferrous sulfate

Ferrous sulfate is an inorganic substance with the chemical formula FeSO4, which is white powder and odorless. Its crystalline hydrate is heptahydrate at room temperature, commonly known as "green vitriol", light green crystals, weathered in dry air, oxidized to brown basic iron sulfate on the surface in humid air, and tetrahydrate at 56.6 ℃ , which becomes a monohydrate at 65 °C. Ferrous sulfate is soluble in water and almost insoluble in ethanol. Its aqueous solution oxidizes slowly in the air when it is cold, and oxidizes quickly when it is hot. Adding alkali or exposed light can accelerate its oxidation. Relative density (d15) 1.897. irritating. Ferrous sulfate can be used as a chromatographic reagent, spot analysis for the determination of platinum, selenium, nitrite and nitrate. Ferrous sulfate can also be used as reducing agent, making ferrite, purifying water, polymerization catalyst, photoengraving and so on.