Today synthetic indicators are the choice of acid-base titrations but due to environmental pollution, availability and cost, the search for natural compounds as an acid-base indicator was started. Indicators help to determine the equivalence point in acid – base titrations (neutralization titrations). They show sharp color change with respect to change in pH. Commonly used indicators for neutralization titrations are synthetic in nature. The highly colored pigments obtained from plants are found to exhibit color changes with variation of pH. This study has been done to investigate the acid base indicator activity of hydro-alcoholic extract of Dahlia pinnata’s flower pigments and compared with already existing synthetic indicators.
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