QUANTIFICATION OF TANNIC ACID PRESENT IN CASHEW (RED COLOUR) (ANARCANDIUM OCCIDEBTALIS) AND ITS USE AS MAJOR RAW MATERIAL IN THE PRODUCTION OF INK

Tannin acids are widely distributed in plants and fruits, most of them are glycosides and, there is need for quantification in other to assess their usefulness as industrial raw materials. Therefore this paper seek to investigate the total amount of tannic acid present in cashew fruit and carry out qualitative test using standard methods. The results of the test were found-positive for tannin acid, the percentage tannin content present was 83.8±0.02%, the infra-red spectrum of the standard and sample were observed to be similar at the peaks for O - H and C - H and at sp and ap2 carboxylic acid range and that, the ink produce has a compatible quality with those currently in the market.