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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

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.

Undecane uses: 1. It is used to produce undecanoic acid, electronic cleaning solution, environmental friendly dry cleaning agent, etc. 2. It is used as a sexual attractant to moths and cockroaches. At the same time, it is also used to manufacture refrigerants, pesticides, lubricants, paints, etc. and chromatographic analysis standards. 3. Chromatographic analysis standard. Petroleum research. Organic synthesis.

It is mainly used as adhesive for printing paper, wood, welding rod, casting, refractory materials, filler for soap industry, soil stabilizer and rubber waterproof agent. It is also used for paper bleaching, mineral flotation and synthetic detergent. It is not only a component of inorganic coatings, but also the raw material of silica gel, molecular sieve, precipitated silica and other silicon products.

The particularity of sodium silicate makes it the basic raw material of silicon compounds. Whether it is directly used as a substrate or carrier, or used after deep processing as an intermediate, it has a wide range of applications. It is widely used in chemical industry, light industry, metallurgy and mechanical casting industry, textile industry, construction and building materials industry, agriculture and other fields.