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Substance Name: Tannins, recovered
RN: 65997-20-8


  • TSCA Definition 2017: A complex combination of vegetable tanning materials recovered from the tanning of leather. It consists of natural tannins, which are predominantly polyphenolic compounds, and/or synthetic tannins, such as aromatic sulfonic acid derivatives.

Molecular Formula

  • Unspecified

Classification Code

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Links to Resources

NLM Resources (File Locators)

Other Resources (Internet Locators)

Names and Synonyms


  • EINECS 266-049-7
  • Reclaimed vegetale tannin

Systematic Name

  • Tannins, recovered

Registry Numbers

CAS Registry Number

  • 65997-20-8

System Generated Number

  • 0065997208