1.氯化铁用于水处理，使排出的污水形成絮状物从而让水变得透明无杂质, 具有显著的沉淀重金属及硫化物、脱色、脱臭、除油、杀菌、除磷、降低出水cod及bod等功效;

2.在工业中用作线路板蚀刻、不锈钢腐蚀以及媒染剂;

3.有机合成催化剂。分析铜、硒和砷，测定酚、胆固醇和胆碱时作指示剂

1.ferric chloride used in water treatment, make the effluent form flocs then be transparent & free from impurities；it has significant effects of precipitating heavy metals and sulfides, decolorizing, deodorizing, degreasing, sterilizing, dephosphorizing, reducing effluent cod and bod, etc;

2.used as circuit board etching, stainless steel corrosion and mordant in industry；

3.organic synthesis catalyst. analysis of copper, selenium and arsenic, as an indicator in the determinations of phenol, cholesterol and choline