氯化铁是一种共价化合物。化学式:FeCl3。又称三氯化铁，是一种深褐色晶体，也有薄片状，熔点306℃，沸点315℃，溶于水，吸水性强，能吸收空气中的水分并使其谵化。以六水硫酸铁和六水氯化铁为橙色晶体，在六水硫酸铁和六水氯化铁的水溶液中溶解。氯化铁是一种重要的铁盐。
　　Ferric chloride is a covalent compound. Chemical formula: FeCl3. Also known as ferric trichloride, is a dark brown crystal, but also thin, melting point 306 C, boiling point 315 C, soluble in water, strong water absorption, can absorb moisture in the air and make it delirium. The orange crystals of ferric sulfate hexahydrate and ferric chloride hexahydrate were dissolved in aqueous solution of ferric sulfate hexahydrate and ferric chloride hexahydrate. Ferric chloride is an important iron salt.
　　主要用于金属蚀刻及污水处理，包括铜、不锈钢、铝等材料的蚀刻。低油度原水处理具有效果好、价格低的优点，但也带来了水发黄的缺点。还用于印染辊筒雕刻、电子工业线路板和荧光数码管的生产。建筑行业常用配制混凝土来增强其强度、耐腐蚀和耐水性。还可与氯化亚铁、氯化钙、氯化铝、硫酸铝、盐酸等防水剂配制成泥浆混凝土，用于无机工业生产其他铁盐和油墨。染料工业被用作染料染料染色的氧化剂。印染工业被用作媒染剂。在冶金工业中用作提取金银的氯化剂。有机工业被用作催化剂、氧化剂和氯化剂。玻璃工业被用作玻璃器皿的热着色剂。肥皂工业被用作从肥皂废液中回收甘油的凝结剂。

　　Mainly used for metal etching and sewage treatment, including copper, stainless steel, aluminum and other materials etching. Low oil content raw water treatment has the advantages of good effect and low price, but it also brings the shortcoming of yellowing. It is also used for printing and dyeing roller engraving, circuit board and fluorescent digital tube production in electronic industry. Concrete is commonly prepared in the construction industry to enhance its strength, corrosion resistance and water resistance. It can also be mixed with waterproofing agents such as ferrous chloride, calcium chloride, aluminium chloride, aluminium sulfate and hydrochloric acid to make mud concrete, which can be used in inorganic industry to produce other iron salts and inks. The dyestuff industry is used as an oxidant for dyeing dyes. The printing and dyeing industry is used as mordant. It is used as chlorinating agent for extracting gold and silver in metallurgical industry. Organic industry is used as catalyst, oxidant and chlorinating agent. The glass industry is used as a thermal colorant for glassware. The soap industry is used as a coagulant to recover glycerol from waste soap liquor.
　　氯化铁的另一个重要用途是五金蚀刻，蚀刻产品有:眼镜架、钟表、电子元器件、铭牌等。
　　Another important use of ferric chloride is metal etching. Etching products include spectacle frames, clocks and watches, electronic components, nameplates, etc.