A blue-green monoclinic crystal or particle. Odorless. Weathering in dry air. The surface is oxidized to brown basic ferric sulfate in humid air. It becomes tetrahydrate at 56.6 ℃ and monohydrate at 65 ℃. Soluble in water, almost insoluble in ethanol. Its aqueous solution is oxidized slowly in air when it is cold and faster when it is hot. The addition of alkali or dew can accelerate its oxidation. Relative density (d15) 1.897. Half lethal dose (mouse, oral) 1520 mg / kg. Have irritation. Anhydrous ferrous sulfate is a white powder, which contains crystal water and is light green crystal. The crystal is commonly called "green", and soluble in aqueous solution is light green. Used for chromatographic analysis reagent. Platinum, selenium, nitrite and nitrate were determined by drip analysis. Reductant. Make ferrite. Clean water. Polymerization catalyst Photographic plate making 

Chuanbei Chemical was established in 1996 (formerly known as Luanchuan Hongye Magnesium Oxide Plant, and was renamed as Sichuan North Chemical Co., Ltd. due to the continuous expansion of production scale). It is the production and sales of magnesium sulfate (MgSo4), ferrous sulfate (FeSo4), etc. A modern enterprise of a range of chemical products. The company now has 30 employees, including product department, sales department, personnel department and product development department. The company has a group of high-quality, highly educated professional chemical research and development personnel, 4 engineers and 3 senior chemical technicians, and the existing MgSo4 production line. With an annual output of 20,000 tons, it is a chemical enterprise with large scale and production capacity in Shandong. The factory has advanced technology, excellent equipment, strong technical force, complete testing means, stable and reliable quality, and the products are sold all over the country. Canada, Sri Lanka, Australia, Laos and other countries. Chuanbei Chemical will continue to serve the new and old customers as always, returning customers with first-class products and first-class service. We sincerely welcome friends from all over the world and friends from all walks of life to visit our company. Sichuan North will work together with you to create a grand foundation.