Nitrogen oxide (N2O4)

CAS Registry Number®

10544-72-6

CAS Name

Nitrogen oxide (N2O4)

Molecular Formula

N2O4

Molecular Mass

92.01

Cite this Page

Nitrogen oxide (N2O4).   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=10544-72-6 (retrieved 2025-07-02) (CAS RN: 10544-72-6).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    21.15 °C

  • Melting Point (1)

    -9.3 °C

  • Density (1)

    1.45 g/cm³ @ Temp: 20 °C

Source(s)

  • (1) Hazardous Substances Data Bank data were obtained from the National Library of Medicine (US)

Other Names and Identifiers

InChI

InChI=1S/N2O4/c3-1(4)2(5)6

InChIKey

InChIKey=WFPZPJSADLPSON-UHFFFAOYSA-N

SMILES

N(N(=O)=O)(=O)=O

Canonical SMILES

O=N(=O)N(=O)=O

Other Names for this Substance

  • Nitrogen oxide (N2O4)
  • Dinitrogen tetroxide
  • Nitrogen tetroxide
  • Dinitrogen tetraoxide
  • Nitrogen tetraoxide

Deleted or Replaced CAS Registry Numbers

1220110-47-3

CAS INSIGHTSTM
Purple and red filaments produced by electrostatic discharge inside a plasma ball.