sodium fluoride and phosphoric acid gel
[USP] a fluoride-containing preparation, consisting of sodium fluoride, hydrofluoric acid, and phosphoric acid, with concentrations of 1.23 per cent fluoride ion and 0.98 per cent phosphoric acid, pH of 3.0 to 3.5, and flavoring, coloring, sweetening, and thickening agents; applied topically to the teeth as a dental caries prophylactic.
Medical dictionary.
2011.