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Substance Name: Residues (petroleum), atm. tower
RN: 64741-45-3


  • TSCA Definition 2018: A complex residuum from the atmospheric distillation of crude oil. It consists of hydrocarbons having carbon numbers predominantly greater than C20 and boiling above approximately ( This stream is likely to contain 5 wt. % or more of 4- to 6-membered condensed ring aromatic hydrocarbons.

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 265-045-2
  • EINECS 265-045-2

Systematic Names

  • Residues (petroleum), atm. tower
  • Residues, petroleum, atm. tower

Superlist Names

  • Atmospheric tower residue (reduced crude oil)
  • Residues, (petroleum), atm. tower

Registry Numbers

CAS Registry Number

  • 64741-45-3

System Generated Number

  • 0064741453