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[Chemical Knowledge]：Properties and Uses of Tartaric Acid

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Tartaric acid is an important organic acid, which widely exists in nature, especially in wine. Therefore, tartaric acid is also known as wine acid. In the field of chemical production raw materials, tartaric acid has a wide range of uses, mainly due to its unique chemical and physical properties.

1. the nature of tartaric acid

1. chemical properties
tartaric acid is a binary carboxylic acid, with acidic, reductive and esterifying chemical properties. Tartaric acid can react with bases to form salts, with alcohols to form esters, and redox reactions can also occur. In addition, tartaric acid also has good thermal stability and can maintain good stability at high temperatures.

2. physical properties
tartaric acid is a white crystalline powder, with strong hygroscopicity, soluble in water, ethanol and ether and other organic solvents. The melting point of tartaric acid is high, about 170 ℃, and has a high boiling point, not volatile.

2. the use of tartaric acid

1. food additives
tartaric acid can be used as food additives, used to adjust the taste and acidity of food. In candy, beverage, jam and other foods, tartaric acid can play the role of acidulant and preservative to extend the shelf life of food.

2. pharmaceutical raw material
tartaric acid can be used as pharmaceutical raw materials, used in the production of drugs for the treatment of heart disease, hypertension and other diseases. Among them, metoprolol tartrate is a common drug for the treatment of cardiovascular diseases.

3. Chemical raw material
Tartaric acid can be used as a chemical raw material for the production of various chemicals. For example, tartaric acid can react with formaldehyde to form methyl tartrate, an important solvent and plasticizer that is widely used in industries such as plastics and rubber.

4. metal surface treatment agent
tartaric acid can be used as a metal surface treatment agent for the removal of metal surface oxides and rust. In the process of metal processing, tartaric acid can play the role of cleaning and passivation, improve the corrosion resistance of metal.

In summary, tartaric acid has a wide range of uses in the field of chemical production raw materials, mainly due to its unique chemical and physical properties. In the future, with the continuous progress of science and technology and the continuous expansion of application fields, the application prospect of tartaric acid in the field of raw materials for chemical production will be broader.

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