Hydroxybenzoic acid CAS 99-96-7 is an organic compound with the molecular formula C7H6O3. The pure product is a colorless small crystalline or crystalline powder. In addition to being effective against fungi, p-hydroxybenzoates have stronger antibacterial properties than benzoic acid and sorbic acid due to their phenolic hydroxyl structure. The characteristic of p-hydroxybenzoic acid esters is that their toxicity is lower than that of benzoic acid, and their antibacterial effect is independent of pH value. However, due to its low water solubility and unique odor, its application in food preservation is limited. In addition to being used as a preservative for food, it is mostly used as a preservative for drugs and cosmetics.

Chinese name: p-hydroxybenzoic acid

Foreign name: p-Hydroxybenzoic acid

Chemical formula: C7H6O3

Molecular weight: 138.13

CAS login number: 99-96-7

EINECS login number: 202-804-9

Melting point: 214 ℃

Boiling point: 336.2 ℃

Water solubility: insoluble or slightly soluble in water

Density: 1.46 g/cm ³

Appearance: Light yellow crystal

Flash point: 199 ℃

Commonly known as nipaginic acid

Purpose

Hydroxybenzoic acid is a widely used organic synthetic raw material, especially its esters, including methyl paraben (Nipagin A), ethyl paraben (Nipagin B), propyl paraben, butyl paraben, isopropyl paraben, and isobutyl paraben. It can be used as a food additive, in soy sauce, vinegar, refreshing beverages (excluding soda), fruit seasoning agents, fruits and vegetables, pickled products, etc. It is also widely used in food, cosmetics, and medicine for preservation In terms of fungicides and fungicides. Hydroxybenzoic acid is also used as an intermediate in dyes and pesticides. Used in the synthesis of organic phosphorus insecticides GYAP and CYP in pesticides; A chromogenic agent used in the dye industry to synthesize thermosensitive dyes; It can also be used as a raw material for the production of plasticizers in color films, synthetic oil soluble couplers “538″, and nylon 12. In addition, it is also used in liquid crystal polymers and plastics.

Used as a preservative and fungicide. Pharmacological experiments have shown that it has a significant protective effect on cobra poisoning in mice. This product can inhibit the growth of mold and react with various alcohols such as ethanol, propanol, and butanol to produce various esters, making it an excellent preservative. This product can also be used as a preservative and insecticide in fields such as dyeing and organic synthesis industry.

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