Zinc chloride is widely used as a flux in soldering and metal surface treatment, helping to remove oxides and promote better metal joining. It is effective in galvanizing processes and enhances the corrosion resistance of metal coatings. In organic synthesis, zinc chloride acts as a Lewis acid catalyst, particularly in reactions such as the Friedel-Crafts acylation and the conversion of alcohols to alkyl chlorides. It is also used in the production of dyes, pigments, and other chemical intermediates. Zinc chloride finds application in the textile industry as a fireproofing agent for fabrics and as a component in fabric finishing processes. It is used in the manufacture of batteries, especially in zinc-carbon and zinc-air types, contributing to their electrochemical performance. Additionally, it serves as a wood preservative, protecting timber from decay and insect damage. In laboratories, it is employed in the preparation of other zinc compounds and in dehydration processes. Its hygroscopic nature makes it useful in some drying agents and industrial cleaners.