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[Chemical Knowledge]：Properties and Uses of Sodium Dihydrogen Phosphate

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Sodium dihydrogen phosphate is a chemical substance widely used in the field of chemical production raw materials, and its properties and uses are very rich. This article will detail the nature of sodium dihydrogen phosphate, production methods, safety and use.

1. the nature of sodium dihydrogen phosphate

sodium dihydrogen phosphate (NaH2PO4 · 2H2O) is a colorless crystal or white crystalline powder, odorless, deliquescence. It is easily soluble in water and practically insoluble in ethanol. Its aqueous solution is acidic, and its pH value is about 4.5. Sodium dihydrogen phosphate is stable in air, loses crystal water when heated to 100 ℃, and decomposes into sodium metaphosphate when heated to 210 ℃.

2. sodium dihydrogen phosphate production method

sodium dihydrogen phosphate production method mainly has two kinds: one is by neutralizing the reaction of phosphoric acid and sodium hydroxide; the other is through the crystallization method, phosphoric acid and sodium hydroxide The sodium phosphate solution generated by the reaction is produced by cooling crystallization, centrifugal separation, drying and other processes.

3. the safety
of sodium dihydrogen phosphate
Sodium dihydrogen phosphate is basically non-toxic and harmless to the human body, but it may be irritating or corrosive under certain conditions. Therefore, in the process of operation and use should follow the relevant safety procedures, wear protective equipment, avoid contact with eyes and skin.

4. The use of sodium dihydrogen phosphate

1. Food additives: Sodium dihydrogen phosphate can be used as a food additive to adjust the pH of food and improve the taste and preservation of food.
2. Buffer: As an acid-base buffer, sodium dihydrogen phosphate is used to control the pH value of the solution and stabilize the pH value in chemical experiments and industrial production.
3. Fabric treatment agent: Sodium dihydrogen phosphate can be used for fabric treatment to improve the water resistance and wrinkle resistance of fabrics.
4. Detergent: Sodium dihydrogen phosphate can be used as a detergent to remove grease and stains from metal surfaces.

In short, sodium dihydrogen phosphate has a wide range of uses in the field of chemical production raw materials, and is of great significance for improving product quality and production efficiency. In the use of the process should follow the relevant safety procedures to ensure personal and property safety.

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