45% ferric chloride contains approximately 13.5% iron.
The molecular formula of ferric chloride is FeCl3, with Fe having a relative atomic weight of 56 and Cl having a relative atomic weight of 35.5. The molecular weight of ferric chloride is 56 + 35.5 x 3 = 162.5. Therefore, the iron content in ferric chloride is 56/162.5, approximately 30%.
The iron content in 45% ferric chloride is 45% x 30%, approximately 13.5%.
Ferric chloride is a blackish-brown hexagonal crystal. It appears garnet red under transmitted light and metallic green under reflected light. It has a melting point of 306℃, a relative density of 2.898, and is readily soluble in water, methanol, ethanol, acetone, and ether. It is soluble in liquid sulfur dioxide, phosphorus tribromide, phosphorus oxychloride, ethylamine, and aniline; slightly soluble in carbon disulfide; and insoluble in glycerol. Laiji Headlines
Ferric chloride is mainly used as a water treatment agent, and also as a mordant, catalyst, chlorinating agent, and in the manufacture of other iron salts. It is primarily used for water purification, but also in printing plate making, pigments, dyes, and pharmaceuticals. (Laiji Headlines)
