Side effects of use of salicylic acidBecause high concentration of salicylic acid has certain harmfulness, cosmetics containing salicylic acid must be marked with warnings to determine the safety of long-term use, and children under the age of 3 should not use it.

Phenol reacts with sodium hydroxide to produce sodium phenol. After distillation and dehydration, carboxylation reaction is carried out with carbon dioxide to prepare sodium salicylate, which is acidified with sulfuric acid to obtain crude product.

Salicylic acid is a fat soluble organic acid with the chemical formula c7h6o3. The appearance is white crystalline powder, and the melting point is 158 ~ 161 ℃. It exists in willow bark, white pearl leaves and sweet birch in nature.

Salicylic acid is a fat-soluble organic acid, chemical formula C7H6O3. Appearance is white crystalline powder, melting point is 158~161℃. It exists in willow bark, white pearl leaves and sweet birch in nature, and is an important fine chemical raw material, which can be used in the preparation of

Physical properties of pure salicylic acid Appearance and properties: white needle-like crystals or hairy crystalline powder. Solubility: Easily soluble in ethanol, ethylene, dilute chlorine, slightly water, and dissolves in boiling water. Melting point: 159°C Boiling point: 211℃, sublimation at 76℃

Salicylic acid is a fat-soluble organic acid with the chemical formula C7H6O3. The appearance is a white crystalline powder with a melting point of 158~161°C. It exists in natural willow bark, white bead leaves and sweet birch. It is an important fine chemical raw material and can be used for the pr