What are the adulterants used in turmeric
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Yellow chalk powder being a cheap material, is used as a common adulterant in Turmeric .
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Synthetic colorants such as metanil yellow, lead chromate, Acid orange 7, Sudan red; rhizomes of related Curcuma sp. besides spent turmeric, starch, chalk and yellow soapstone are the main adulterants in traded turmeric while synthetic curcumin is an adulterant of natural curcumin.
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