Salicylic acid is often used as an anti-inflammatory materials. It is known for its ability to ease aches and pains and reduce fevers.
Salicylic acid tends to atmospherically subimate when temperature higher than 76°C; Easily to decarboxylate and change into phenol and carbon dioxide when heated atmospherically. It is slightly soluble in water but dissolves in boiling water easily, soluble in ethanol or ether and slightly soluble in Chloroform.
| Items | Standard | |
| Appearance | White or Almost white crystalline powder or colourless acicular crystals | |
| Solubility | Slightly soluble in water, freely soluble in ethanol (96 percent), sparingly soluble in methylene chloride | |
| Identification A. Melting point of salicylic acid | 158—161 ℃ | |
| Identification B. IR-Spectrum | Should be complied with Reference Spectrum | |
| Appearance of solution | Clear and colorless | |
| Chloride | ≤100 ppm | |
| Sulfate | ≤200 ppm | |
| Heavy metals | ≤20 ppm | |
| Loss on drying | ≤0.5% | |
| Sulphated ash | ≤0.1% | |
| Related substances |
4-hydroxybenzoic acid | ≤0.1% |
| 4-hydroxyisophthalic acid | ≤0.05% | |
| Phenol | ≤0.02% | |
| Other impurities | ≤0.05% | |
| Total impurities | ≤0.2% | |
| Assay | 99.0%—100.5% | |
18mt-20mt per 20ft container