Used primarily in water fluoridation to help prevent tooth decay, fluorosilicic acid solution is added to public water supplies in controlled amounts. It serves as an economical and effective source of fluoride ions. The solution is also employed in the production of other fluoride compounds and in metal surface treatment processes, such as aluminum etching and cleaning. In some industrial applications, it is utilized for the manufacture of synthetic cryolite and fluorosilicates. Additionally, it finds use in certain types of detergents and cleaning agents for its ability to dissolve mineral deposits.