Solid product is brown-green crystals, in the air easily absorb moisture and deliquescence. Liquid product color is red-brown liquid, soluble in water, ethanol, glycerol ether and acetone, benzene insoluble. Ferric chloride used in water treatment flocculant, the formula FeCl3 · 6H2O

Mainly used for metal etching, wastewater treatment which comprises etching etching copper, stainless steel, aluminum and other materials, the original water treatment low oil length, with good effect, the advantages of cheap, but it will bring color yellowed shortcomings. Also used for dyeing cylinder engraving, electronic circuit boards and industrial digital fluorescent tube production