Water testing
Fluoride are beneficial for healthy teeth. High levels of fluoride can weaken bones, leading to skeletal fluorosis. he optimal fluoride level in drinking water to prevent tooth decay should be 0.7 milligrams of fluoride per liter of water,
Hydrogen fluoride (HF, CAS No. 7664-39-3) is a colourless, pungent liquid or gas
with a boiling point of 19.5 °C. It is highly soluble in water, in which it forms
hydrofluoric acid.
Sodium fluoride (NaF, CAS No. 7681-49-4) is a colourless to white solid that is
moderately soluble in water.
Fluorosilicic acid (H2SiF6, CAS No. 16961-83-4), which is also known as
hexafluorosilicic acid, is a colourless solid that is highly soluble in water.
