Tin(II) fluoride anhydrous
Tin(II)Fluoride
CAS: 7783-47-3
Molecular Formula: F2Sn
Tin(II) fluoride anhydrous - Names and Identifiers
| Name | Tin(II)Fluoride |
| Synonyms | crest TIN FLUORIDE Tin difluoride Tin ii fluoride TIN(+2)FLUORIDE Tin(II)Fluoride TIN(II) FLUORIDE Tin(II) Fluoride STANNOUS FLUORIDE cap-tinmouthrinse Stannous Fluoride Tin(II) fluoride anhydrous difluoro-lambda~2~-stannane |
| CAS | 7783-47-3 |
| EINECS | 231-999-3 |
| InChI | InChI=1/2FH.Sn.4H/h2*1H;;;;;/q;;+2;;;;/p-2/r2FH.H4Sn/h2*1H;1H4/q;;+2/p-2 |
| InChIKey | ANOBYBYXJXCGBS-UHFFFAOYSA-L |
Tin(II) fluoride anhydrous - Physico-chemical Properties
| Molecular Formula | F2Sn |
| Molar Mass | 156.71 |
| Density | 4.57 g/mL at 25 °C (lit.) |
| Melting Point | 215°C |
| Boling Point | 850°C |
| Water Solubility | Soluble in potassium hydroxide and potassium fluoride. Insoluble in water, ethanol, ether and chloroform. |
| Appearance | Powder, Crystals or Crystalline Powder |
| Specific Gravity | 4.57 |
| Color | White to off-white |
| Exposure Limit | ACGIH: TWA 2 mg/m3; TWA 2.5 mg/m3NIOSH: IDLH 100 mg/m3; IDLH 250 mg/m3; TWA 2 mg/m3 |
| Merck | 14,8784 |
| Storage Condition | -20°C |
| Stability | Stable. Non-flammable. Avoid contact with water or oxidizing agents. Moisture-sensitive. |
| Sensitive | Air & Moisture Sensitive |
| Physical and Chemical Properties | Boiling Point: 850 Melting Point: 215
|
| Use | Used as a spectral purity reagent |
Tin(II) fluoride anhydrous - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R38 - Irritating to the skin R41 - Risk of serious damage to eyes |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S39 - Wear eye / face protection. |
| UN IDs | UN 2923 8/PG 3 |
| WGK Germany | 3 |
| RTECS | XQ3450000 |
| FLUKA BRAND F CODES | 1-3-10 |
| TSCA | Yes |
| HS Code | 28261990 |
| Hazard Note | Corrosive |
| Hazard Class | 8 |
| Packing Group | II |
Tin(II) fluoride anhydrous - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| stannous fluoride | stannous fluoride is a long-term clinical professional ingredient for dentists, is approved by the U. S. Food and Drug Administration (FDA) can effectively reduce gingivitis ingredients. But initially, stannous fluoride was an extremely unstable substance; Crest took 15 years to stabilize stannous fluoride in toothpaste, health experts series toothpaste is currently the only available ingredients containing stannous fluoride toothpaste. This stannous-fluoride toothpaste is capable of releasing biologically active stannous and fluoride ions during brushing and acting directly locally on the gums. A large number of rigorous scientific clinical studies have shown that stannous-fluoride toothpaste can help us fight against oral bacteria and reduce gingival inflammation. Therefore, the choice of antibacterial anti-inflammatory ingredients and professional ingredients are right. Stannous fluoride is used in the soldering of aluminum alloys. |
| mechanism of action | tin difluoride has extensive inhibitory effect on various types of bacteria, especially periodontal pathogens, and can last for several hours. Stannous fluoride also has a certain antagonistic effect on gingival inflammatory response by inhibiting the production of bacterial toxic metabolites (such as hydrogen sulfide). |
| Application | the introduction of stannous fluoride is to replace sodium fluoride to prevent tooth decay. Stannous fluoride converts the calcium-containing mineral apatite to fluorapatite, which makes the enamel more resistant to acid Aggression produced by bacteria. |
| solubility | soluble in water, almost insoluble in ethanol, ether, chloroform. |
| solubility in water (g/100ml) | grams dissolved per 100ml of water: 30g/20 ℃ |
| preparation method | by reacting stannous oxide with excess hydrofluoric acid in an oxygen-free environment (protected with boiling distilled water and nitrogen), it was concentrated and dried in a desiccant dryer of magnesium perchlorate. |
| Use | as a spectral purity reagent |
| production method | 1.67.4g(0.5mol) of stannous oxide was placed in a ML polyethylene beaker and 15-20ml of deoxygenated water was added for wetting. In a nitrogen stream to remove oxygen, the above wetted stannous oxide was heated to 60 ° C. On a water bath, and 46.0g(1.1mol, excess 10%) of 48% hydrofluoric acid was slowly added thereto with gentle stirring. When about half of the stannous oxide is dissolved, the reaction is exothermic and the reaction is intensified. After all the stannous oxide was dissolved, the Beaker was cooled in a nitrogen-filled desiccator. 2h after crystallization. The mother liquor was poured into another polyethylene beaker. The crystallization and the mother liquor were separately placed in a desiccator (the drying agent was KOH: CaCl2 = 1:1). Two days later the crystals were transferred to a magnesium perchlorate desiccant and dried. The crystals precipitated in the mother liquor after 4 days were treated in the same manner. The yield of the first crystallization was 69%, and the recovery from the mother liquor was 17%, 86% in total. Both purity is the same. 2.30g of spongy tin was placed in a C- shaped pressure-resistant container lined with a corrosion-resistant nickel-base alloy of haxonce, and then vacuum was applied. Then, about 60g of hydrogen fluoride gas was pressurized into the container, and the container was closed. Heating at 200 °c for 8H. The hot gas in the vessel was discharged to about 100 °c. Then pump with vacuum pump for 1H. The remaining solid was further dried under vacuum at 80 °c for 4H to remove the last trace of hydrogen fluoride gas. There are two methods of production in the industry. (1) tin oxide and hydrofluoric acid metathesis reaction. (2) the reaction of anhydrous hydrofluoric acid with tin tetrachloride. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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