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The principal yellow colorant in the extracts from the leaves and twigs of Gambier, Cutch and Kino resin. Catechin is a lightfast and washfast color that is used on wool, silk and cotton to obtain a dark brown color. It is used for tanning leather. Catechin is sometimes called by the ambiguous name of catechol, a term that is also used for pyrocatechol.

Synonyms and Related Terms

catechinic acid; catechuic acid; catechol (flavan); catecol (Esp.); catechina (It.); catequina (Port.)

Physical and Chemical Properties

  • Soluble in water, ethanol, acetic acid, acetone. Insoluble in benzene, chloroform, ligroin.
  • Needle crystals from ethanol.
Composition C15H14O6
Melting Point 93-96 C
Molecular Weight mol. wt. = 290.27

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