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Substance Name: Oleum
RN: 8014-95-7

Classification Codes

Classification Code

  • Tumor Data

Superlist Classification Codes

  • Overall Carcinogenic Evaluation: Group 1
  • Reportable Quantity (RQ) = 1000 lb

Molecular Formula

  • H2-O4-S.O3-S

Molecular Weight

  • 178.1408
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Names and Synonyms

Name of Substance

  • Oleum
  • Sulfuric acid fuming


  • Fuming sulfuric acid
  • HSDB 1236
  • Oleum
  • Oleum iodisum
  • Sulfur trioxide, mixt. with sulfuric acid
  • Sulfuric acid fuming
  • Sulfuric acid mixture with sulfur trioxide
  • Sulfuric acid, mixt with sulfur trioxide

Systematic Names

  • Sulfuric acid, fuming
  • Sulfuric acid, mixt. with sulfur trioxide

Superlist Names

  • Oleum
  • Oleum (Fuming Sulfuric acid)
  • Oleum 65% by weight or more free sulfur trioxide (SO3)
  • Sulfuric acid (fuming)
  • Sulfuric acid, fuming
  • Sulfuric acid, fuming <30% free sulfur trioxide
  • Sulfuric acid, fuming <30% free sulfur trioxide [UN1831] [Corrosive]
  • Sulfuric acid, fuming > or =30% free sulfur trioxide
  • Sulfuric acid, fuming > or =30% free sulfur trioxide [UN1831] [Corrosive]
  • Sulfuric acid, mixture with sulfur trioxide
  • UN1831

Registry Numbers

CAS Registry Number

  • 8014-95-7

Other Registry Number

  • 17107-61-8

System Generated Number

  • 0008014957

Molecular Formulas

Molecular Formula

  • H2-O4-S.O3-S

Molecular Formula Fragments

  • H2-O4-S
  • O3-S

Structure Descriptors








Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LC50 inhalation 347ppm/1H (347ppm)   Toxicology and Applied Pharmacology. Vol. 42, Pg. 417, 1977.