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Substance Name: Residues (petroleum), catalytic cracking depropanizer, C4-rich
RN: 71329-37-8


  • TSCA Definition 2017: A complex residuum from the stabilization of catalytic cracked naphtha hydrocarbon streams. It consists predominantly of hydrocarbons having carbon numbers predominantly in the range of C3 through C5, primarily C4.

Molecular Formula

  • Unspecified

Classification Code

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Links to Resources

NLM Resources (File Locators)

Regulatory Agencies (Superlist Locators)

Other Resources (Internet Locators)

Names and Synonyms


  • Catalytic cracking depropanizer bottoms, butane-butylene olefin hydrocarbon stream

Systematic Names

  • Residues (petroleum), catalytic cracking depropanizer C4-rich
  • Residues (petroleum), catalytic cracking depropanizer, C4-rich

Superlist Name

  • Residues, (petroleum), catalytic cracking depropanizer, C4-rich

Registry Numbers

CAS Registry Number

  • 71329-37-8

System Generated Number

  • 0071329378