Overview
Stannous fluoride (CAS 7783-47-3 ), also known commercially as tin difluoride, is an inorganic tin salt used primarily as an active ingredient in oral care and pharmaceutical formulations.
It delivers fluoride ion activity combined with antimicrobial action, making it a distinct functional choice compared to sodium fluoride or amine fluoride systems for manufacturers.
In toothpaste and mouth rinse formulations, it is used as both a caries-prevention agent and an antibacterial active, targeting plaque and gingivitis at concentrations typically ranging from 0.4% to 0.454%.
Pharmaceutical oral care products, including prescription-strength gels and professional dental treatments, rely on it where dual fluoride and antimicrobial efficacy is required by the formulation brief.
It also appears in specialty whitening and sensitivity-relief dentifrice systems, where its stannous ion component contributes to tubule occlusion and stain-blocking performance for the end user.
Some industrial surface treatment applications use this material in metal finishing processes, though oral care remains the dominant commercial demand for this specific chemical compound.
The product is supplied as a white crystalline powder. USP and pharmaceutical-grade specifications are the most commercially relevant, with purity levels typically at 98% or higher.
These levels meet compendial standards, and FCC grade material is available for suppliers serving food-adjacent or oral care markets requiring food-safe certification for their products.
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Physical Properties
| Melting Point | 213 °C |
| Boiling Point | 850 °C |
| Density | 4.57 g/cm³ @ Temp: 25 °C |
| Appearance | Stannous fluoride is a white crystalline solid with a bitter, salty taste. |
| Color | White to off-white |
| Form | Powder, Crystals or Crystalline Powder |
| Water Solubility | Soluble in potassium hydroxide and potassium fluoride. Insoluble in water, ethanol, ether and chloroform. |
| Log P | -1.357 (est) |
Safety & Handling
Danger GHS05 GHS06 GHS07 GHS09 GHS08 Hazard Statements H290 May be corrosive to metals H300 Fatal if swallowed H301 Toxic if swallowed H302 Harmful if swallowed H314 Causes severe skin burns and eye damage H315 Causes skin irritation H318 Causes serious eye damage H319 Causes serious eye irritation H335 May cause respiratory irritation H372 Causes damage to organs through prolonged or repeated exposure H411 Toxic to aquatic life with long lasting effects Precautionary Statements P234 Keep only in original packaging. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P363 Wash contaminated clothing before reuse. P390 Absorb spillage to prevent material damage. P391 Collect spillage. P405 Store locked up. P406 Store in a corrosion-resistant/… container with a resistant inner liner. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P316 Get emergency medical help immediately. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P301+P330+P331 Rinse mouth. Do NOT induce vomiting. P302+P361+P354 IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 28261990 |
| UN Number | 2923 |
| ADR Class | 8 |
| Packing Group | III |
| Storage Class | 6.1D - Non-combustible acute toxic Cat.3 toxic hazardous materials or hazardous materials causing chronic effects |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 7783-47-3
- EC Number
- 231-999-3
- Mol. Weight
- 156.71
- HS Code
- 28261990
- Category
- Salts & Minerals