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[Chemical Knowledge]：Properties and uses of superphosphate

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Superphosphate is a widely used raw material for chemical production, especially in fertilizer manufacturing and food processing industry. This article will detail the properties and uses of superphosphate. The properties of

1. superphosphate

superphosphate is a white crystalline powder with good water solubility. Its chemical formula is Ca(H2PO4)2 and contains phosphate ions and calcium ions. The properties of superphosphate are mainly manifested in the following aspects:

1. Acidic: The aqueous solution of superphosphate is acidic, and the pH value is between 2 and 3. This is because superphosphate contains phosphoric acid, which is a medium and strong acid.
2. hygroscopicity: superphosphate has a strong hygroscopicity, easy to absorb moisture in the air and agglomerate. Therefore, it is necessary to pay attention to moisture during storage and use.
3. Thermal stability: superphosphate is stable at room temperature, but it will decompose at high temperature to produce phosphoric acid and calcium oxides.

2. the use of superphosphate

1. fertilizer manufacturing: superphosphate is a commonly used phosphate fertilizer, containing plant phosphorus. In fertilizer manufacturing, superphosphate is often mixed with nitrogen fertilizer and potassium fertilizer to make compound fertilizer to meet the needs of plant growth.
2. Food processing: superphosphate can be used as a food additive to regulate the acidity and taste of food. For example, adding superphosphate to pasta products can increase the elasticity of gluten and improve the taste of pasta.
3. Animal husbandry: superphosphate can be used as an animal feed additive to provide phosphorus for animal growth and promote animal growth and development.
4. Chemical production: In chemical production, superphosphate can be used to prepare various phosphates, such as trisodium phosphate, potassium dihydrogen phosphate, etc. These phosphates are widely used in the fields of detergents, water treatment agents, antiseptics and the like.

In short, as an important raw material for chemical production, superphosphate has been widely used in fertilizer manufacturing, food processing, animal husbandry and chemical production. During use, it is necessary to pay attention to moisture-proof and avoid high temperature environment according to its nature.

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