Cosmetics

Tin is one of the earliest metals used by mankind and one of the most widely used metals in industry. It has the excellent characteristics of soft texture, low melting point, strong expansibility, strong plasticity and non toxicity. It is mainly used in the manufacture of solder, tinplate, alloy, chemical products and so on. It is widely used in electronics, information, electrical appliances, chemical industry, metallurgy, building materials, machinery, food packaging, atomic energy and aerospace industry.

Sodium bisulfate (chemical formula: NaHSO4), also known as acid sodium sulfate, niter cake. Its anhydrous matter is hygroscopic. Sodium bisulfate decomposes into sodium pyrosulfate before reaching its melting point, so its melting point is difficult to determine. The aqueous solution of sodium bisulfate is acidic, and the pH of 1mol / L solution is about 1.4. In some cases, sodium bisulfate solution can be used instead of 39.0-42.0% sulfuric acid solution. For example, acetic acid can be obtained by distilling the mixed solution of sodium bisulfate and sodium acetate, and the sodium bisulfate solution can also react with most carbonates to produce carbon dioxide. To some extent, sodium bisulfate shows the properties of sulfuric acid and sodium sulfate mixture. This can be reflected when sodium bisulfate is dissolved in ethanol (it will decompose into sulfuric acid soluble in ethanol and sodium sulfate insoluble in ethanol). 2NaHSO4 → Na2SO4 + H2SO4

Sodium fluoride is an important fluoride product, widely used in wood preservatives, wine fungicides, electrolytic aluminum regulator, dental fluoride and other fields. Adding sodium fluoride to toothpaste can prevent caries. Fluoride and enamel can form fluorapatite on enamel surface, improve the hardness and acid resistance of enamel, and reduce plaque formation, reduce the incidence rate of dental caries.

It is mainly used for preparing inorganic chemical products and chemical reagents for phenol determination. It is also commonly used as oxidant, laboratory bromine generator, cosmetics, cold perm agent. It is used as wool finishing agent in industry, and also for the extraction and purification of precious and heavy metals.

It can be used as lubricant, emulsifier and thickener. It can play a thickening role in cosmetics and reduce the amount of surfactant needed to form a stable system.