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[Chemical Knowledge]：Properties and uses of malic acid

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Malic acid is an important organic acid, which widely exists in nature, especially in apples, lemons and other fruits. In the field of chemical production raw materials, malic acid has many properties and uses.

1. the nature of malic acid

1. physical properties: malic acid is colorless crystals or white crystalline powder, has strong hygroscopicity, soluble in water, ethanol and ether and other organic solvents.

2. chemical properties: malic acid has two functional groups of carboxyl and hydroxyl, so it has strong acidity and alcohol properties. Malic acid can occur esterification, acylation, reduction, oxidation and other reactions.

2. the use of malic acid

1. food additives: malic acid can be used as food additives, used to adjust the taste and sour taste of food, but also as a preservative to extend the shelf life of food.

2. Pharmaceutical raw materials: Malic acid can be used as raw materials in the pharmaceutical field for the production of drugs and health products. For example, malic acid can be used in the production of drugs for the treatment of heart disease, hyperlipidemia and the like.

3. chemical raw materials: malic acid can be used in the production of various chemicals, such as plastics, coatings, adhesives and so on. Malic acid can also be used as a raw material for electrolyte solutions for the production of lithium-ion batteries.

4. Environmental protection field: Malic acid can be used as a biodegradable agent for the treatment of waste water, waste gas and other environmental protection fields. Because malic acid has good biocompatibility and biodegradability, it has broad application prospects in the field of environmental protection.

In short, malic acid has a wide range of uses in the field of chemical production raw materials, can be used in food, medicine, chemical and environmental protection and other fields. With the continuous development and progress of science and technology, the application prospect of malic acid will be more broad.

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