Abstract

STUDY OF CASSIA SIAMEA AS NATURAL, ECONOMIC AND EFFECTIVE ALTERNATIVE FOR SYNTHETIC INDICATORS IN 21ST CENTURY.

Kishor Vinayak Gaikwad*

ABSTRACT

The Indictor is an essential part in laboratory procedures. There is need to develop green indicator as effective alternative for synthetic indicator used in laboratory. The acid base indicators so far used in schools and colleges are Phenolphthalein, Methyl red and Methyl Orange. In present study we introduced Cassia Siamea as natural indicator alternative to acid base titration. The aqueous extract of Cassia Siamea flowers were tested for pH and used as indicator for Strong acid- Strong base, Strong acid -Weak base and weak acid- Strong base titrations. The performance was found comparable to that of conventional acid base indicators. The accuracy of end points was tested using volumetric methods. It was found very useful, economical, simple and accurate indicator for said titrations.

Keywords: Natural indicator, Cassia Siamea, Acid-Base Titration.