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Substance Name: Residues (petroleum), caustic-treated vacuum distillate
RN: 68478-14-8


  • TSCA Definition 2018: A complex residuum produced by the vacuum distillation of raw light distillate, long lube distillate or heavy vacuum distillate in the presence of caustic soda. It consists predominantly of sodium naphthenates.

Molecular Formula

  • Unspecified

Classification Code

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Names and Synonyms


  • EINECS 270-793-8
  • Rerun bottoms (petroleum)

Systematic Names

  • Residues (petroleum), caustic-treated vacuum distillate
  • Residues, petroleum, caustic-treated vacuum distillate

Registry Numbers

CAS Registry Number

  • 68478-14-8

System Generated Number

  • 0068478148