Perera,HUdawatte,C .S2025-02-282025-02-282018-05https://dr.ichemc.ac.lk/handle/123456789/369page 32,33 Technical Sessions : A - 26A pH indicator is a chemical compound used to visually determine the acidity or basicity of a solution. Extracts of both red and green leaves from Terminalia catappa were investigated to develop a natural pH sensitive indicator.enpH sensitive indicatorDevelopment of a pH sensitive indicator from Terminalia catappa leavesArticle