• The colouring matter of the tamarind seed testa

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/027/01/0052-0055

    • Keywords

       

      Tannin; Calcium Hydroxide; Dimethyl Sulphate; Anhydrous Sodium Acetate; Caustic Potash

    • Abstract

       

      The tamarind seed testa contains about 32 per cent. of tannins of which 35 per cent. is phlobatannin, the rest being mostly catechol tannin. The phlobatannin yields almost colourless methyl and acetyl derivatives which exhibit marked optical activity, supporting the idea that phlobatannins are probably hydroxy flavan derivatives.

    • Author Affiliations

       

      P S Rao1

      1. Forest Research Institute, Dehra Dun
    • Dates

       
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