• Preeti S Kumarmath
• Anusha Kawatal
• Kruti Nimbargi

Natural substances are biodegradable compounds which are obtained from natural resources unlike synthetic or man-made substances that are synthesized artificially mimicking the natural substances. The utmost reason for the extended usage of such synthetic substances is, they are more affordable than the naturally derived substances. One such example for xenobiotic substances is dye. Dyes are basically coloured substances which chemically bind to substrate and impart color to it. These synthetic dyes find its applications majorly in paper, cosmetic, textile and food industries. But due to its vast and continuous usage, some synthetic dyes have become harmful to both living beings as well as to the environment. This paper reviews the detrimental effects of synthetic dyes and essential requirements for substituting the synthetic dye with that of natural dye. The natural dye discussed in this paper is extracted from the hull of Terminalia catappa fruit (An Indian almond fruit). Further, the composition of T. catappa fruit, importance of flavonoids, one of the major plant secondary metabolites present in the extract and different extraction methods that can be opted for extracting the natural dyes are discussed.

Anti microbial activity, eco friendly, extraction techniques, mordants, natural dyes, phenolic compounds, substitute, synthetic dyes, Terminalia catappa fruit hull.

"A review on extraction of dye from Terminalia catappa hull: A substitute to synthetic dyes", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 2, page no.e59-e64, February-2022, Available :http://www.jetir.org/papers/JETIR2202409.pdf

"A review on extraction of dye from Terminalia catappa hull: A substitute to synthetic dyes", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 2, page no. ppe59-e64, February-2022, Available at : http://www.jetir.org/papers/JETIR2202409.pdf