In database:

185-430 nm

Dinitrogen tetraoxide (N₂O₄)
Molecular weight
Freezing point
Boiling point

UV cross-sections
Please see The MPI-Mainz UV/VIS Spectral Atlas

Additional References
Striking Anharmonic Resonances in N₂O₄: Supersonic Jet Fourier Transform Spectra at 13.3, 7.9, 5.7, and 3.2 mm; M. Hepp, R. Georges, M. Herman, J.-M. Flaud, and W.J. Lafferty; J.Mol.Struct. 517:171-180 (2000).
Figure 2 showing 1253-1270 cm^-1.
Figure 4 showing 742-760 cm^-1.
Figure 6 showing 3118-3132 cm^-1.

Notes
Fundamental frequencies from NIST Chemistry Webbook
n₁ 1383 cm^-1 (a_g)
n₂ 813 cm^-1 (a_g)
n₃ 262 cm^-1 (a_g)
n₄ 82 cm^-1 (a_u)
n₅ 1718 cm^-1 (b_1g)
n₆ 480 cm^-1 (b_1g)
n₇ 425 cm^-1 (b_1u)
n₈ 657 cm^-1 (b_2g)
n₉ 1757 cm^-1 (b_2u)
n₁₀ 265 cm^-1 (b_2u)
n₁₁ 1261 cm^-1 (b_3u)
n₁₂ 755 cm^-1 (b_3u)



List of available data for all molecules in database
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