Sulfur trioxide

CAS Registry Number®

7446-11-9

CAS Name

Sulfur trioxide

Molecular Formula

O3S

Molecular Mass

80.06

Cite this Page

Sulfur trioxide.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=7446-11-9 (retrieved 2024-11-21) (CAS RN: 7446-11-9).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    45 °C

  • Melting Point (1)

    16.8 °C

  • Density (2)

    1.9 g/cm³

Source(s)

  • (1) Hazardous Substances Data Bank data were obtained from the National Library of Medicine (US)
  • (2) International Chemical Safety Cards data were obtained from the National Institute for Occupational Safety and Health (US)

Other Names and Identifiers

InChI

InChI=1S/O3S/c1-4(2)3

InChIKey

InChIKey=AKEJUJNQAAGONA-UHFFFAOYSA-N

SMILES

S(=O)(=O)=O

Canonical SMILES

O=S(=O)=O

Other Names for this Substance

  • Sulfur trioxide
  • Sulfur oxide (SO3)
  • Sulfuric anhydride
  • Nisso Sulfan

Deleted or Replaced CAS Registry Numbers

856577-62-3

CAS INSIGHTSTM
Targeted protein degrader structure, illustration