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[Chemical Knowledge]：What are the role and uses of p-Hydroxybenzoic acid?

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p-hydroxybenzoic acid is a white powder crystal, tasteless, odorless, tingling, slightly soluble in water, chloroform, soluble in ether, acetone and benzene, soluble in ethanol in any proportion, almost insoluble in carbon disulfide. Dissolve in 125 parts of cold water.

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Eight functions and uses

of p-hydroxybenzoic acid 1. p-hydroxybenzoic acid is a widely used organic synthetic raw material, especially its esters, including methyl p-hydroxybenzoate (paraben A), ethyl ester (paraben B), propyl ester, butyl ester, isopropyl ester, isobutyl ester, can be used as food additives, used in soy sauce, vinegar, cool drinks (except soda water), fruit flavoring, fruits and vegetables, pickled products,

2. Used in food, cosmetics, medicine, antiseptic, fungicide, etc. P-hydroxybenzoic acid is also used as an intermediate for dyes and pesticides. Used in pesticides to synthesize organophosphorus pesticides GYAP and CYP;

1. Dye industry used in the synthesis of thermal dye developer; It can also be used in color film and synthetic oil-soluble color former "538" and nylon 12 as plasticizer production raw materials.

2. Used for liquid crystal polymers and plastics.

3. It is a phenol derivative of benzoic acid, which can inhibit most gram-positive bacteria and some gram-negative bacteria

6 is mainly used as the basic raw material for fine chemical products. Nipagin esters, or p-hydroxybenzoic acid esters, have been widely used as preservatives for food, medicine and cosmetics. It is also widely used in the preparation of various dyes and fungicides., Color film and various oil-soluble color forming agents, etc.,

7 New high temperature resistant polymer p-hydroxybenzoic acid polyester is the basic raw material.

8. Organic synthesis. Preservative. Fungicides.

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