Sodium Fluoride (USP), CAS 7681-49-4, has the formula NaF. Sodium Fluoride USP is the primary used additive in the dental industry to fluoridate products such as fluoride treatments, toothpaste, Mouth-washer, and other fluoride containing products. It can also be used for water fluoridation, but Sodium Fluorosilicate or Fluorosilicic Acid is typically used in that application.