Quick Search
Stannous fluoride, commonly referred to commercially as stannous fluoride (from Latin stannum, 'tin'), is a chemical compound with the formula SnF2.
Stannous fluoride is a colorless solid used as an ingredient in toothpastes.
Stannous fluoride is an alternative to sodium fluoride for the prevention of cavities (tooth decay).
CAS Number: 7783-47-3
Molecular Formula: F2Sn
Molecular Weight: 156.71
EINECS Number: 231-999-3
Synonyms: 7783-47-3, STANNOUS FLUORIDE, Tin difluoride, Tin bifluoride, Tin Fluoride (SnF2), Easygel, Stancare, Stanide, Crest, Stop, Iradicar SnF2, Iradicav SnF2, King’s Gel-Tin, Cap-Tin Mouthrinse, Stop Home Treatment, Iradicar Stannous Fluoride, Stannous fluoride (SnF2), Stannous fluoride (USP), 3FTR44B32Q, DTXSID6064822, Stannous fluoride [USP], Burkhart, Evernamel, Fluoridex, Gingimed, Omnigel, Stangard, Whitening, Stance, SmileSense, PerioMed, Gelato Homecare, Sorbet Homecare, Tin Difluorides, Gum Detoxify, Plak Smacker, Gum Purify, Kids Crest, Difluoride, Tin, Stannous flouride, Kids Kare, Ionite H, Difluorides, Tin, Crest Pro Health, Crest Pro-Health, Dr. Gingiva, Just For Kids, Gel-Kam Mint, GLEEM Protection, Stannous Fluorides, Pro-den Rx, CVS Sens Whtng, Complete Protection, Fluoride, Stannous, Crest Gum Detoxify, Crest Premium Plus, Home Care Fluoride, Polident ProPartial, Rite Aid Sensitive, MIPaste One Perio, Fluorides, Stannous, Sensitivity and Gum, OMNI, DOCTORS CHOICE, KIDS CHOICE, Gum and Enamel Repair, Sensitive Rapid Relief, Complete Protection TP, CURODONT PROTECT, STANOUS FLUORIDE, STANNOUS FLUORIDE;TIN(+2)FLUORIDE;TIN(II) FLUORIDE;Tin difluoride;TIN FLUORIDE;cap-tinmouthrinse;crest;Tin(II) fluoride anhydrous
Stannous fluoride was first released commercially in 1956, in Crest toothpaste.
Stannous fluoride was discovered and developed by Joseph Muhler and William Nebergall.
In recognition of their innovation, they were inducted into the Inventor's Hall of Fame.
The fluoride in stannous fluoride helps to convert the calcium mineral hydroxyapatite in teeth into fluorapatite, which makes tooth enamel more resistant to bacteria-generated acid attacks.
The calcium present in plaque and saliva reacts with fluoride to form calcium fluoride on the tooth surface; over time, this calcium fluoride dissolves to allow calcium and fluoride ions to interact with the tooth and form fluoride-containing apatite within the tooth structure.
This chemical reaction inhibits demineralisation and can promote remineralisation of tooth decay. The resulting fluoride-containing apatite is more insoluble, and more resistant to acid and tooth decay.
Stannous fluoride is a medication used to treat dental hypersensitivity, produce enamel, prevent gingivitis and cavities, and prevent periodontal infections.
Stannous fluoride is an inorganic fluoride compound commonly used in oral care products, especially toothpaste and mouth rinses.
Its chemical formula is SnF₂, and it consists of tin in the +2 oxidation state combined with fluoride ions.
Stannous fluoride is also known as tin(II) fluoride.
Chemically, stannous fluoride is both a fluoride source and a tin-based compound.
The fluoride ions contribute to tooth enamel protection, while the stannous (Sn²⁺) ions provide additional biological activity.
This dual functionality distinguishes it from simple sodium fluoride.
Physically, stannous fluoride appears as a white to off-white crystalline powder.
It is slightly soluble in water and more soluble in acidic environments.
In aqueous solutions, it can be chemically unstable and prone to oxidation.
Stannous fluoride exhibits strong reactivity due to the Sn²⁺ ion.
It can oxidize to tin(IV) compounds in the presence of oxygen or moisture.
For this reason, it is often stabilized or formulated carefully in products.
Functionally, stannous fluoride is known for its anticaries (anti-cavity) activity.
It enhances remineralization of tooth enamel and reduces enamel demineralization.
This helps protect teeth against decay.
In addition to cavity prevention, stannous fluoride provides antimicrobial and anti-plaque effects.
It inhibits the growth of oral bacteria and reduces plaque formation.
It also helps control gingivitis.
Stannous fluoride is particularly effective in reducing tooth sensitivity.
It forms a protective layer over exposed dentin tubules.
This reduces nerve stimulation caused by temperature or touch.
Stannous fluoride is best described as a multifunctional oral-care active ingredient.
Its importance lies in combining fluoride benefits with antimicrobial and desensitizing properties.
Careful formulation is required to maintain stability and effectiveness.
Stannous fluoride plays an important role in modern therapeutic oral-care formulations.
Its effectiveness depends strongly on maintaining tin in the +2 oxidation state.
This requirement has driven advances in toothpaste formulation and packaging.
To improve stability, stannous fluoride is often used in anhydrous or low-water formulations.
Some products employ chelating agents, pH control, or protective matrices.
These strategies help prevent oxidation and precipitation of tin compounds.
Stannous fluoride interacts directly with dentin and enamel surfaces.
It can occlude dentinal tubules by forming tin-containing deposits.
This physical barrier mechanism explains its strong anti-sensitivity performance.
The compound also shows anti-erosive behavior.
It reduces enamel softening caused by acids from food and beverages.
This protection extends beyond caries prevention into enamel preservation.
Stannous fluoride remains a clinically validated, multifunctional fluoride source.
Stannous fluorides continued use reflects its unique combination of remineralization, antimicrobial action, erosion resistance, and sensitivity relief.
Advances in formulation science have reinforced its relevance in contemporary oral care.
Molecular formula: SnF2
Molecular weight: 156.71 g/mol
Melting point: 215 °C
Boiling point: 850 °C
Density: 4.57 g/mL (25 °C)
Specific gravity: 4.57
Storage temperature: −20 °C
Solubility: Soluble in potassium hydroxide and potassium fluoride; insoluble in water, ethanol, ether, chloroform
Form: Powder, crystals or crystalline powder
Color: White to off-white
Biological source: Human
Sensitive: Air and moisture sensitive
Merck index: 14,8784
Crystal system: Monoclinic
Space group: C2/c
Lattice constant a: 1.336 nm
Lattice constant b: 0.491 nm
Lattice constant c: 1.379 nm
Alpha: 90°
Beta: 109.1°
Gamma: 90°
Cell volume: 0.8547 nm³
Exposure limits (ACGIH): TWA 2 mg/m³; TWA 2.5 mg/m³
Exposure limits (NIOSH): IDLH 100 mg/m³; IDLH 250 mg/m³; TWA 2 mg/m³
Stability: Stable; non-flammable; avoid contact with water or oxidizing agents; moisture-sensitive
Cosmetics ingredients functions: Antiplaque; oral care
InChI: 1S/2FH.Sn/h2*1H;/q;;+2/p-2
InChIKey: ANOBYBYXJXCGBS-UHFFFAOYSA-L
SMILES: F[SnH2]F
LogP: −1.357 (estimated)
Stannous fluoride, or Tn(II) Fluoride, is a compound commonly used in toothpastes for the prevention of gingivitis, dental infections, cavities, and to relieve dental hypersensitivity.
Although similar in function and activity to Sodium Fluoride (NaF), the conventionally added ingredient in toothpastes, stannous fluoride has been shown to be more effective at stopping and reversing dental lesions 2.
Stannous fluoride manages and prevents dental caries and gingivitis by promoting enamel mineralization 1, reducing gingival inflammation and bleeding 3,4 through its potential broad-spectrum antibiotic effect and modulation of the microbial composition of the dental biofilm 2.
Stannous fluoride is an FDA-approved over-the-counter product.
Stannous fluoride has been used in dentistry and oral care for several decades.
It was one of the earliest fluoride compounds introduced for caries prevention.
Its use predates many modern fluoride salts and remains important today.
The presence of tin (Sn²⁺) ions gives stannous fluoride unique properties beyond fluoride delivery.
Tin ions can interact with bacterial cell walls and enzymes.
This contributes to its antibacterial and anti-gingivitis effects.
In aqueous environments, stannous fluoride is chemically sensitive.
It can hydrolyze or oxidize, forming insoluble tin compounds.
Modern formulations often include stabilizers to maintain its activity.
Stannous fluoride can form a protective tin-rich layer on tooth surfaces.
This layer helps resist acid attack from food and bacteria.
Stannous fluoride also contributes to reduced enamel erosion.
Compared with sodium fluoride, stannous fluoride provides broader oral-health benefits.
While both deliver fluoride for remineralization, stannous fluoride adds antimicrobial and desensitizing action.
This makes it especially useful in therapeutic toothpastes.
Stannous fluoride has shown effectiveness against dental erosion caused by acidic beverages.
It helps protect enamel from chemical wear, not just bacterial decay.
This is increasingly relevant with modern dietary habits.
In clinical studies, stannous fluoride has demonstrated reduction of plaque, gingival bleeding, and sensitivity.
These effects depend on concentration and formulation quality.
Consistent use is required for sustained benefits.
Stannous fluoride is primarily used in topical applications.
It is not intended for systemic fluoride supplementation.
Its action is localized to the tooth surface and oral environment.
Stannous fluoride is recognized as a high-performance fluoride compound.
Its combination of enamel protection, antibacterial action, and sensitivity relief makes it distinct among fluoride agents.
Proper stabilization and formulation are essential to maximize its benefits.
In microbiological terms, stannous fluoride reduces bacterial adhesion and metabolic activity.
It interferes with plaque biofilm formation rather than simply killing bacteria.
This helps maintain a healthier oral microbiome balance.
Stannous fluoride has been evaluated extensively in clinical dentistry.
Its benefits are well documented when used at recommended concentrations.
Adverse effects are minimized with proper formulation and controlled exposure.
One known cosmetic effect of stannous fluoride is potential tooth staining.
This can occur due to tin interactions with dietary chromogens.
Modern formulations include stain-control systems to address this issue.
Stannous fluoride is regulated as an approved oral-care active ingredient in many countries.
Stannous fluorides allowed concentration and labeling requirements are clearly defined.
Uses Of Stannous fluoride:
Stannous fluoride is used as a toothpaste additive to help prevent tooth decay.
Stannous fluoride is used in the prevention of dental caries.
Stannous fluoride is an active ingredient in toothpastes.
Stannous fluoride is primarily used in toothpaste formulations as an active oral-care ingredient.
It helps prevent dental caries by promoting enamel remineralization.
Stannous fluoride also reduces enamel demineralization caused by acids.
In anti-gingivitis toothpastes, stannous fluoride is used for its antimicrobial activity.
It reduces plaque formation and helps decrease gingival inflammation.
This supports overall gum health.
Stannous fluoride is used in desensitizing toothpaste products.
It forms protective deposits over exposed dentinal tubules.
This reduces tooth sensitivity to heat, cold, and touch.
In mouth rinses, stannous fluoride provides topical fluoride protection and antibacterial effects.
It enhances enamel resistance to acid attack.
These products are typically used as adjuncts to brushing.
Stannous fluoride is applied in professional dental treatments.
Dentists may use it in gels or topical applications for high-risk patients.
These treatments provide enhanced protection against decay.
In anti-erosion oral-care products, stannous fluoride helps protect enamel from acidic beverages and foods.
It forms a protective layer that reduces surface wear.
This use addresses dietary acid exposure.
Stannous fluoride is used in specialized therapeutic oral-care formulations.
These include products designed for patients with high plaque levels, sensitivity, or gum problems.
Its multifunctional action supports comprehensive oral health.
Stannous fluoride is used wherever combined cavity protection, antibacterial action, and sensitivity relief are required in oral-care products.
Stannous fluoride is used in daily-use therapeutic toothpastes designed for long-term oral health maintenance.
It provides continuous protection against cavities, plaque buildup, and enamel erosion with regular brushing.
In post-dental-procedure care products, stannous fluoride helps protect sensitive or recently treated tooth surfaces.
It supports enamel recovery and reduces discomfort after scaling, whitening, or periodontal treatments.
Stannous fluoride is applied in products for patients with high caries risk.
This includes individuals with dry mouth, orthodontic appliances, or frequent acid exposure.
Its combined fluoride and antimicrobial action offers enhanced protection.
In anti-halitosis (bad breath) oral-care formulations, stannous fluoride helps reduce odor-causing bacteria.
By limiting bacterial metabolism, it contributes to fresher breath.
This effect complements flavoring agents.
Stannous fluoride is used in enamel-strengthening and repair-focused products.
It helps reinforce weakened enamel and slow early-stage erosion.
This is especially relevant for modern diets high in acidic foods and drinks.
In oral-care products for older adults, stannous fluoride supports gum health and sensitivity control.
It addresses age-related enamel wear and exposed dentin.
These formulations aim for gentle but effective protection.
Stannous fluoride is also used in research and clinical evaluation of oral-care technologies.
It serves as a benchmark active ingredient in comparative studies.
This supports development of new dental formulations.
Stannous fluoride is applied wherever multi-benefit oral protection, therapeutic performance, and long-term enamel care are required.
Safety Profile Of Stannous fluoride:
Poison by ingestion and intraperitoneal routes, questionable carcinogen.
When heated to decomposition it emits toxic fumes of F-.
Stannous fluoride has moderate hazard potential, mainly related to its fluoride content and the reactivity of tin(II) compounds.
Stannous fluoride is safe for consumer use only at regulated, low concentrations in oral-care products.
Concentrated or industrial forms require careful handling.
Skin contact with stannous fluoride powder or concentrated solutions may cause irritation.
Prolonged exposure can lead to redness or discomfort.
Protective gloves are recommended when handling raw material.
Eye contact may cause irritation or pain due to its acidic and fluoride nature.
Immediate rinsing with plenty of water is required if exposure occurs.
Eye protection is advised in manufacturing and laboratory environments.
Inhalation of dust can cause respiratory tract irritation.
Symptoms may include coughing or throat discomfort.
Dust generation should be minimized, and adequate ventilation used.
Ingestion of excessive amounts is harmful.
High fluoride intake can cause gastrointestinal irritation, nausea, or vomiting.
Chronic excessive exposure may contribute to fluoride toxicity (fluorosis).
Stannous fluoride is not flammable and does not pose a fire or explosion hazard.
However, it may decompose when heated, releasing irritating fluoride-containing fumes.
Standard precautions for inorganic salts are sufficient.
In oral-care use, improper or excessive use may lead to tooth staining or mild oral irritation.
