CAS No.:149-91-7
Gallic Acid
Gallic acid is a trihydroxybenzoic acid, a type of phenolic acid, a type of organic acid, also known as 3,4,5-trihydroxybenzoic acid, found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plants. The chemical formula is C6H2(OH)3COOH. Gallic acid is found both free and as part of hydrolyzable tannins.
Application
Gallic acid is commonly used in the pharmaceutical industry. It is used as a standard for determining the phenol content of various analytes by the Folin-Ciocalteau assay; results are reported in gallic acid equivalents.Gallic acid can also be used as a starting material in the synthesis of the psychedelic alkaloid mescaline.
Specification
Test Items | Standard | Results |
| Appearance | White crystalline powder | White crystalline powder |
| The amount of gallic acidcontent (dry basis) | ≥99.0% | 99.2% |
| Loss on drying | ≤10.0% | 8.0% |
| Tannic acid | no cloudy | no cloudy |
| Water solution | no cloudy | no cloudy |
| APHA | ≤180 | 120 |
| Turbidity | ≤10 | 4.0 |
| Sulphate | ≤0.01% | 0.01 |
| Residue on ignition | ≤0.1% | 0.053 |