Ferric chloride hexahydrate is a crystalline water compound, and ferric chloride anhydrous is a brown powder.
Ferric Chloride Hexahydrate
Molecular formula: FeCl3.6H2O
Properties: Ferric chloride hexahydrate is yellow-brown crystalline or massive solid, odorless and astringent. The melting point is 37 degrees. Boiling point 280-285 degrees. Soluble in water, soluble in ethanol and ether. Its solution is acidic. coagulates proteins. Deliquescence, in the air can deliquescence into reddish-brown liquid.
Uses: This product is mainly used as corrosive agent for industrial water treatment, photography and printing plate making, catalyst and oxidant in organic synthesis industry, oxidant and mordant in dye industry to manufacture other iron salts, pigments, inks, raw materials for medicine, etc.
Ferric Chloride Anhydrous
Molecular formula: FeCl3
Properties: Ferric chloride anhydrous has strong hygroscopicity and can generate dihydrate and hexahydrate. Soluble in water, ethanol, acetone, and also soluble in liquid sulfur dioxide, ethylamine, and aniline. Insoluble in glycerol, phosphorus trichloride. Aqueous solutions are acidic.
Uses: Mainly used as industrial water treatment agent, corrosive agent for electronic circuit boards, chlorinating agent in metallurgical industry, oxidant and mordant in dye industry, catalyst and oxidant in organic industry, chlorinating agent, and in the manufacture of iron salts and pigments raw material.
The two are mainly due to the difference in the content of crystal water, indicating that the temperature of crystallization is different, the formation temperature of ferric chloride hexahydrate is lower than that of ferric chloride anhydrous.
Chemical water of crystallization is water molecules bound in compounds, they are not liquid water. Many crystals contain crystal water, but not all crystals contain crystal water. When the solute is crystallized out of the solution, a certain number of water molecules are bound in the crystal, and such water molecules are called crystal water. In a crystalline substance, a certain number of water molecules bound to ions or molecules by chemical bond force. The amount of water of crystallization indicates that the formation temperature of different crystalline compounds of the substance is different.
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