4-Hydroxybenzoic acid 99-96-7
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| Chemical Formula | C7H6O3 |
| Molecular Weight | 138.12 |
| Structural Formula | |
| Density | 1,46 g/cm3 |
| Melting Point | 214-217℃ |
| Boiling Point | 336.2°C at 760 mmHg |
| Flash Point | 171.3°C |
| Water Solubility | 5 g/L (20℃) |
| Vapor Pressure | 4.48E-05mmHg at 25°C |
| Solubility | Slightly soluble in water and chloroform; soluble in ethanol in any proportion; almost insoluble in carbon disulfide. Soluble in 125 parts of cold water. |
| Refractive Index | 1.4600 (estimate) |
| Storage Conditions | 2-8℃ |
| Sensitivity | Sensitive to light |
| Appearance | White to beige crystalline powder |
| Physicochemical Properties | Properties White crystalline powder, odorless, tasteless, with a numbing sensation when tasted. Solubility Easily soluble in hot water, alcohols, and ethers; slightly soluble in cold water and benzene; insoluble in carbon disulfide. Soluble in 125 parts of cold water. |
Main Uses: p-Hydroxybenzoic acid is a widely used organic synthesis raw material, especially its esters, including methyl p-hydroxybenzoate (methylparaben), ethyl p-hydroxybenzoate (ethylparaben), propyl ester, butyl ester, isopropyl ester, and isobutyl ester. It can be used as a food additive in soy sauce, vinegar, soft drinks (excluding soda), fruit flavorings, fruits and vegetables, pickled products, etc. It is also widely used as a preservative, antifungal agent, and bactericide in food, cosmetics, and pharmaceuticals.
p-Hydroxybenzoic acid is also used as an intermediate for dyes and pesticides. In pesticides, it is used to synthesize organophosphorus insecticides GYAP and CYP; in the dye industry, it is used to synthesize color developers for thermosensitive dyes; it can also be used for color films and the synthesis of oil-soluble color former "538" and as a raw material for plasticizers in Nylon 12. Additionally, it is used in liquid crystal polymers and plastics.
| Industry Category | Chemicals/Carboxylic Acid Derivatives |
|---|---|
| Product Category | |
| Brand: | 中塑供应链 |
| Spec: | 99.0%；25KG编织袋 |
| Stock: | |
| Origin: | China / Shandong |
