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Substance Name: Extract oils (coal), tar base, collidine fraction
RN: 68937-63-3


  • TSCA Definition 2017: The extract produced by the acidic extraction of bases from crude coal tar aromatic oils, neutralization, and distillation of the bases. Composed primarily of collidines, aniline, toluidines, lutidines, xylidines.

Molecular Formula

  • Unspecified

Classification Code

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Links to Resources

NLM Resources (File Locators)

Other Resources (Internet Locators)

Names and Synonyms


  • Collidine fraction
  • EINECS 273-077-3

Systematic Names

  • Extract oils (coal), tar base, collidine fraction
  • Extract oils, coal, tar base, collidine fraction

Registry Numbers

CAS Registry Number

  • 68937-63-3

System Generated Number

  • 0068937633