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Substance Name: Sludges (shale oil), acid
RN: 85410-26-0


  • TSCA Definition 2018: A complex combination of sulfuric acid, sulfonic acids, their esters, and high-molecular-weight organic compounds formed during the treating of shale oil fractions with sulfuric acid. The hydrocarbon portion of the sludge may be predominantly aromatic, with H/C atom ration on the order of 1.8 and an N/C atom ration on the order of 0.1, together with heterocyclic compounds containing oxygen and sulfur.

Molecular Formula

  • Unspecified

Classification Code

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Names and Synonyms


  • Acid sludge (shale oil)

Systematic Name

  • Sludges (shale oil), acid

Registry Numbers

CAS Registry Number

  • 85410-26-0

System Generated Number

  • 0085410260