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Substance Name: Humic acids
RN: 1415-93-6


  • Organic matter in a state of advanced decay, after passing through the stages of COMPOST and PEAT and before becoming lignite (COAL). It is composed of a heterogenous mixture of compounds including phenolic radicals and acids that polymerize and are not easily separated nor analyzed. (E.A. Ghabbour & G. Davies, eds. Humic Substances, 2001).
  • TSCA Definition 2019: The brown polymeric product from the decomposition of organic matter, particularly dead plants. This combination of polymers may contain aromatic and heterocyclic structures, carboxy groups, and nitrogen.

Molecular Formula

  • Unspecified

Classification Codes

  • Chelating Agents
  • Natural Product
  • Sequestering Agents
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Links to Resources

Names and Synonyms

Name of Substance

  • Humic acids

MeSH Heading

  • Humic Substances


  • Agro-Lig
  • CCRIS 7701
  • EINECS 215-809-6
  • Enersol
  • Humic acid
  • Humic acids
  • Humification
  • Peat
  • PGS 10
  • Soil organic matter, humic acids
  • Ulmic acids

Systematic Name

  • Humic acids

Registry Numbers

CAS Registry Number

  • 1415-93-6

System Generated Number

  • 0001415936