Zinc chloride is a nutrient supplement A number of salts containing the tetrachlorozincate anion, ZnCl2 4, are known. Caulton's reagent, V2Cl3(thf)6Zn2Cl6 is an example of a salt containing Zn2Cl2 6. The compound Cs3ZnCl5 contains tetrahedral ZnCl2 4 and Cl anions. No compounds containing the ZnCl4 6 ion have been characterized. Four crystalline forms, (polymorphs) , of ZnCl2 are known, and in each case the Zn2+ ions are trigonal planar coordinated to four chloride ions. The pure anhydrous orthorhombic form rapidly changes to one of the other forms on exposure to the atmosphere and a possible explanation is that the presence of OH facilitates the rearrangement. Rapid cooling of molten ZnCl2 gives a glass, that is, a rigid amorphous solid and this ability has been related to the structure in the melt.<br /> Zinc chloride belongs to the family of Transition Metal Chlorides. These are inorganic compounds in which the largest halogen atom is Chlorine, and the heaviest metal atom is a trans

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