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Substance Name: Gases (petroleum), C3-4, isobutane-rich
RN: 68477-33-8


  • TSCA Definition 2018: A complex combination of hydrocarbons from the distillation of saturated and unsaturated hydrocarbons usually ranging in carbon numbers from C3 through C6, predominantly butane and isobutane. It consists of saturated and unsaturated hydrocarbons having carbon numbers in the range of C3 through C4, predominantly isobutane.

Molecular Formula

  • Unspecified

Classification Code

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Links to Resources

NLM Resources (File Locators)

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Other Resources (Internet Locators)

Names and Synonyms


  • EC 270-724-1
  • EINECS 270-724-1
  • Isobutane extract
  • Isobutane-rich C3-4 gases (petroleum)

Systematic Names

  • Gases (petroleum), C3-4 isobutane-rich
  • Gases (petroleum), C3-4, isobutane-rich
  • Gases, petroleum, C3-4, isobutane-rich

Superlist Names

  • Gases (petroleum), C3-4, isobutane rich
  • Gases, (petroleum), C3-4, isobutane-rich

Registry Numbers

CAS Registry Number

  • 68477-33-8

System Generated Number

  • 0068477338