Most tannins are only soluble in polar medium, which restricts their use. To overcome this issue, OmniChem has set up a program to prepare esters of both hydrolysable and condensed tannins with fatty acids to obtain tannin derivatives that can be used in apolar medium.
OmniChem has prepared a range of esters of both hydrolysable and condensed tannins using various methodologies.
Two particular products have been scaled starting from hydrolysable gallnut tannin: the tannin oleate (TANOL) and the tannin palmitate (TAPA).
OmniChem advises tannin esters whenever regular tannins cannot be used due to solubility reasons or due to the specific properties of the fatty esters. OmniChem is keen to discuss with interested customers and to develop the desired product.