Which form of fluoride is available in solution form?

Fluorosilicic acid is available in a solution form and is commonly used in water fluoridation processes. As a highly soluble compound, it helps to effectively manage and maintain the desired fluoride concentrations in drinking water. Fluorosilicic acid is often preferred for its ease of handling and dosing in water treatment facilities, especially because it dissolves readily in water and does not pose significant challenges related to solubility compared to other forms of fluoride.

In contrast, calcium fluoride and stannous fluoride are generally found in solid form and require additional processes to dissolve them in water. Sodium fluoride, while it can be found in both solid and solution forms, primarily exists in solid form when used in water treatment and may need to be dissolved in water before it can be applied. Thus, fluorosilicic acid stands out as the fluoride form readily available in a solution, making it effective for direct application in water treatment.