Sodium fluoride

Sodium fluoride (CAS 7681-49-4), also sold as Floridine, is an inorganic salt used for its biocidal, flux and fluoridating properties.

Where is Sodium fluoride used?

• Water treatment: fluoridation agent that adjusts fluoride levels in municipal drinking water
• Pharmaceutical and oral care: active fluoride source in toothpaste, mouth rinse and topical dental preparations
• Textile, leather and paper: preservative and biocide against microbial degradation
• Building and construction: flame retardant additive and wood preservative against fungi and insects
• It also serves as a pH buffer and fluoride source in pharmaceutical manufacturing.
• Used in the manufacture of glass.
• Used in metal treatment.
• Used as an electrolyte in electroplating baths.
• Used in polymerization.

Formulation notes

• Reacts with acids, producing toxic and corrosive fumes.

Regulatory status

• Classified in the EU with hazard statement H301 (toxic if swallowed), acute toxicity class.
• Already harmonised classified for skin irritation category 2 (H315, causes skin irritation).
• Classified under UN transport hazard class 6.1 with packing group III.
• The EU occupational exposure limit (EU-OEL) for sodium fluoride as fluoride is 2.5 mg/m³ as TWA.

Storage, packaging and handling

• Must be stored separately from acids, food and feed.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.