Our company has improved the green extraction method to reduce solvent residues and adjusted the pH control Settings to maintain the antioxidant activity of tannic acid, which is crucial for applications in textiles and food additives.

By establishing the necessary purification process, the purity of gallic acid can be enhanced, and its heavy metal concentration can be reduced to below 0.1 ppm, meeting the requirements of pharmaceutical grade. To extend the shelf life of pharmaceutical excipients, their stability under different storage conditions should also be examined.

The dicarboxylic acid formula was improved by using the central refinement micro-powder method, reducing the product particle size to 5-10 μm, which is suitable for cosmetic consumers to use.