Zinc chloride solution 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 adhesion of coatings on metal surfaces. In organic synthesis, it acts as a catalyst or reagent, particularly in reactions like the Friedel-Crafts acylation and cleavage of ethers. The solution also finds use in the textile industry for fabric treatment and as a fireproofing agent for wood and other materials. Additionally, it is employed in laboratories for the preparation of other zinc compounds and in some medicinal formulations as an antiseptic or astringent.