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Substance Name: Naphthenic oils (petroleum), complex dewaxed heavy
RN: 64742-75-2


  • TSCA Definition 2017: A complex combination of hydrocarbons obtained by removing straight chain paraffin hydrocarbons as a solid by treatment with an agent such as urea. It consists of hydrocarbons having carbon numbers predominantly in the range of C20 through C50 and produces a finished oil having a viscosity of at least 100 SUS at (19cSt at It contains relatively few normal paraffins.

Molecular Formula

  • Unspecified

Classification Code

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Links to Resources

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Names and Synonyms


  • EINECS 265-179-1

Systematic Names

  • Naphthenic oils (petroleum), complex dewaxed heavy
  • Naphthenic oils, petroleum, complex dewaxed heavy

Registry Numbers

CAS Registry Number

  • 64742-75-2

System Generated Number

  • 0064742752