Sodium fluoride is a colorless shiny crystal or white powder compound with a specific gravity of 2.25, a melting point of 993°C and a boiling point of 1695°C. Dissolve in water (solubility of 10°C 3.66,20°C 4.06,30°C 4.22,40°C 4.4,60°C 4.68,80°C 4.89,100°C5.08), hydrofluoric acid, slightly soluble in alcohol. The aqueous solution is weakly alkaline, dissolved in hydrofluoric acid to form sodium hydrogen fluoride, which will corrode the glass.poisonous! It is widely used as phosphating promoter, agricultural insecticide, sealing materials and preservatives in the coating industry.
Character: a colorless cubic or tetragonal crystal. Sensitive to water. Solubility in water (g / 100ml): 4 at 15°C, 4.3 at 25°C, 5 at 100°C, insoluble in ethanol. Partial hydrolysis of the aqueous solution is an alkaline reaction. The newly prepared saturated solution had a pH of 7.4. Its aqueous solution can make the glass fluffy, but its dry crystals or powder can be stored in glass bottles. The relative density was 2.78. Melting point of 993℃. The boiling point is 1,695℃. Toxic, LD50 (rat, given orally) 0.18g / kg. There is a strong irritant. Use of sodium fluoride: used as a phosphating promoter in the coating industry to stabilize the phosphating solution, refine phosphating and improve the performance of phosphating membranes. The phosphating treatment of aluminum and its alloy is sealed with Al3 +, which has a very harmful negative catalytic effect, so the phosphorization treatment is very smooth, wood preservative, agricultural insecticide, fungicides for brewing industry, drug preservatives, welding flux, alkaline zinc salt galvanized additive and enamel, paper industry, etc. Sodium fluoride (NAF) is an important fluoride salt used for the manufacture of other fluoride raw materials.1 as used as agricultural pesticides and fungicides.2. As a wood preservative, water treatment agent, ceramic pigment, boiling steel manufacturing, light metal fluoride salt treatment agent, smelting and refining, as a protective layer, as a UF 3 adsorbent in the nuclear industry.3. In the production of sealing materials and brake liners, the wear resistance is added. The mechanical blade planer is inlaid with steel to improve the welding strength.4. Enamel pharmaceutical industry and paper production and building materials.5. Used as a phosphating promoter in the coating industry to stabilize phosphating solutions, refine phosphating and improve the performance of phosphating membranes. Aluminum and its alloys are sealed with AL3 +, which has a very harmful negative catalytic effect, making phosphating smooth, and is an alkaline zincate galvanizing additive. Cleaning fluid, flux and flux for steel and other metals.
6. Fux and sunscreen of ceramic glass and enamel, the processing of leather and leather in the leather industry, and the preservatives of adhesives.
Is that all about sodium fluoride, do you know it? Jiayuan chemical is a set of fluoride production, processing, research and development and trade in one of the enterprise, for sodium fluoride we have professional people professional technology.
Post time: Sep-12-2023
