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Substance Name: Residues (petroleum), hydrodesulfurized atmospheric tower
RN: 64742-78-5


  • TSCA Definition 2018: A complex combination of hydrocarbons obtained by treating an atmospheric tower residuum with hydrogen in the presence of a catalyst under conditions primarily to remove organic sulfur compounds. 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

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Names and Synonyms


  • EC 265-181-2
  • EINECS 265-181-2

Systematic Names

  • Residues (petroleum), hydrodesulfurized atmospheric tower
  • Residues, petroleum, hydrodesulfurized atmospheric tower

Superlist Name

  • Residues, (petroleum), hydrodesulfurized atmospheric tower

Registry Numbers

CAS Registry Number

  • 64742-78-5

System Generated Number

  • 0064742785