Sodium chloride (NaCl) is a salt that you find on the table.
Sodium fluoride (NaF) is a salt that occurs in most groundwater, but in very small quantities, typically 0.1 to 10.0 mg / liter. It is often added to water to bring the concentration of NaF up to 1.0 mg / liter, when the concentration is lower, which it usually is.
Both NaCl and NaF are chemicals. So is water (H2O) Oxygen O2. In fact humans are made entirely of chemicals, contrary to what you might think listening to the anti-science left.
Just getting started here.
