Introduction of Sodium dihydrogen phosphate dihydrate

Sodium dihydrogen phosphate dihydrate, with the chemical formula NaH₂PO₄・2H₂O, is a kind of phosphate compound containing two crystalline waters. It is a white crystalline powder, easily soluble in water, aqueous solution is weakly acidic, in dry air will slowly weathering loss of water of crystallization, when heated to 100 ℃ will lose all the water of crystallization into anhydrous, these characteristics for its application in many fields has laid the foundation.

In the food industry, Sodium dihydrogen phosphate dihydrate is rich in application details. When used in meat processing, it penetrates into the muscle tissue and binds with protein molecules to improve the water holding capacity of proteins. For example, in the production of sausage, adding 0.3% - 0.5% of Sodium dihydrogen phosphate dihydrate can reduce the water loss of sausage in the cooking process by 10% - 15%, the taste is more tender and juicy. In aquatic processing, such as frozen shrimp, adding the right amount of it can effectively prevent the shrimp in the freezing and thawing process due to cell rupture caused by water loss, to maintain the elasticity and fullness of shrimp. As a bulking agent used in bread production, it reacts with sodium bicarbonate to release carbon dioxide, forming uniform air holes, so that the volume of the bread increased by about 20%, and the texture is more fluffy, and the shelf life can be extended by 1 - 2 days.

Sodium dihydrogen phosphate dihydrate has many applications in the pharmaceutical field. In oral drug solution, it acts as pH regulator, which can stabilize the pH value of drug solution between 4.5 and 5.5, a range that can reduce the irritation of drugs to the gastrointestinal tract. For example, in vitamin C injection, adding appropriate amount of Sodium dihydrogen phosphate dihydrate can inhibit the oxidative decomposition of vitamin C, so as to prolong the validity period of the drug for 3-6 months. In some topical ointments, it can maintain the pH of the ointment in the appropriate range to ensure the stability and effectiveness of the drug ingredients, while reducing the irritation of the skin.

In agriculture, when Sodium dihydrogen phosphate dihydrate is used as a foliar fertilizer, there are definite differences in the dosage and spraying time for different crops. For wheat, spraying a solution at a concentration of 0.2% - 0.3% at 50 - 60 kg per acre at the nodulation stage promotes neat spikes and increases thousand grain weight. Grapes in the pre-flowering and young fruit spraying 0.3% of the solution, can improve the fruiting rate, so that the fruit sugar content increased by 1 - 2 percentage points. For flowers like phosphorus, such as the moon season, spraying in the bud differentiation period, can promote full flower buds, the number of flowers increased, more colorful flowers.

In industrial application, Sodium dihydrogen phosphate dihydrate has different functions. In water treatment, it combines with calcium and magnesium ions in water to form soluble complexes. Adding 5-10 mg per liter of water can reduce the concentration of calcium and magnesium ions in water by 30%-50%, effectively preventing the scaling of pipelines and equipment. In the electroplating industry, as one of the components of the electrolyte, it can stabilize the pH value of the electrolyte and make the plating layer crystallize carefully and evenly. For example, in the galvanizing process, the electrolyte contains 20 - 30 g / liter of Sodium dihydrogen phosphate dihydrate, which can make the zinc plating layer gloss, and enhance the adhesion, reducing the phenomenon of plating off.

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