【中文】分子式：FeSO4·7H2O；分子量：278.05；密度：3.4（无水物），相对密度1.899（14.8℃，七水物）；熔点：64℃（七水物）。性状：七水物为蓝色单斜晶体，无水物为白色粉末。溶解情况：溶于水和甘油，几乎不溶于乙醇。用途：有还原作用，用作净水剂、煤气净化剂、消毒剂、除臭剂、饲料添加剂、食品添加剂、媒染剂、除草剂，并用于制墨水、颜料等；医疗上用作补血剂；农业上用作微量元素肥料，防治小麦黑穗病、苹果和梨的疱痂病、果树的腐烂病，能除去树干上的青苔及地衣。制备或来源：天然产物有水绿矾，可由铁与稀硫酸作用而制得，也可由钛铁矿制取钛白粉时副产硫酸亚铁，经精制后可作饲料添加剂。备注：在90℃失去六分子结晶水，在300℃失去全部结晶水，在空气中渐渐风化并氧化而成黄褐色；无水物与水作用又重新变为蓝绿色；有腐蚀性，在干燥空气中吸潮。包装及贮运：散装或编织袋内衬塑料薄膜袋装，产品贮存在干燥的库房中，防止风化；运输过程中防止雨淋、受潮；失火时可用水和灭火机扑救。类别：微量元素肥料。
【English】Formula: FeSO4.7H2O; molecular weight: 278.05; density: 3.4 (anhydrous), relative density 1.899 (heptahydrate, 14.8 degrees C); melting point: 64 degrees C (heptahydrate). Properties: the heptahydrate is blue monoclinic crystals and the anhydrous form is a white powder. Solubility: soluble in water and glycerol, almost insoluble in ethanol. Uses: it has a reducing effect and is used as a water purifying agent, gas purifying agent, disinfectant, deodorant, feed additive, food additive, mordant and herbicide, and in the manufacture of inks and pigments. In medicine it is used as a blood tonic. In agriculture it is used as a trace-element fertilizer to control wheat smut, apple and pear scab and fruit tree rot, and removes moss and lichen from tree trunks. Preparation and sources: the natural product is melanterite; it can be obtained by the action of iron with dilute sulphuric acid, or as a by-product from producing titanium dioxide from ilmenite, which after refining can be used as a feed additive. Notes: it loses six molecules of crystal water at 90 degrees C and all its crystal water at 300 degrees C, gradually weathering in air and oxidizing to a yellowish-brown colour; the anhydrous form turns blue-green again on contact with water; it is corrosive and hygroscopic in dry air. Packing and storage: bulk or woven bags with an inner plastic film liner; store in a dry warehouse to prevent weathering, and protect from rain and moisture during transport; in case of fire, water and fire extinguishers may be used. Category: trace-element fertilizer.
