What is the purity of sodium silicofluoride?

The purity of sodium silicofluoride, which is often used in water fluoridation processes, is 0.985. This high level of purity indicates that the compound has very few impurities, making it suitable for use in treatment processes where the chemical's effectiveness and safety are paramount. A purity of 0.985 means that 98.5% of the material consists of sodium silicofluoride itself, ensuring that the remaining percentage contains minimal contaminants that could interfere with water quality or treatment efficacy. This is critical in public health applications where precise and effective chemical dosing is necessary to ensure that the desired outcomes, such as cavity prevention, are achieved without introducing harmful substances into the drinking water supply.

The other options represent varying levels of purity that are below the acceptable standard for such applications, which would likely result in inadequate performance when used in drinking water systems.