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The purification of anhydrous zinc chloride can be done through sublimation with hydrogen chloride gas, followed by the subsequent heating of the sublimate to around 400 °C with dry nitrogen gas. Zinc chloride can also be purified by treating it with thionyl chloride.
Zinc chloride is used in dry cells as an electrolyte. Other Uses - It is used as a condensing agent, disinfecting purposes, dehydrating agent, wood preservative, deodorant, and disinfectant. A mixture of zinc oxide and hexachloroethane can be used in smoke grenades.
Dilute aqueous zinc chloride was used as a disinfectant under the name "Burnett's Disinfecting Fluid". From 1839 Sir William Burnett promoted its use as a disinfectant as well as a wood preservative.
