3H-Pyrazol-3-one, 2,4-dihydro-5-methyl-2-phenyl-

• Formula: C₁₀H₁₀N₂O
• Molecular weight: 174.1992
• IUPAC Standard InChI: InChI=1S/C10H10N2O/c1-8-7-10(13)12(11-8)9-5-3-2-4-6-9/h2-6H,7H2,1H3 Copy

  
• IUPAC Standard InChIKey: QELUYTUMUWHWMC-UHFFFAOYSA-N Copy
• CAS Registry Number: 89-25-8
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  View 3d structure (requires JavaScript / HTML 5)
• Other names: Norphenazone; Edaravone; 2-Pyrazolin-5-one, 3-methyl-1-phenyl-; C.I. Developer 1; Developer Z; 1-Phenyl-3-methylpyrazolone; 3-Methyl-1-phenyl-2-pyrazolin-5-one; 1-Phenyl-3-methyl-5-pyrazolone; 3-Methyl-1-phenyl-5-pyrazolone; Methylphenylpyrazolone; NCI-C03952; 5-Pyrazolone, 3-methyl-1-phenyl-; 1-Fenyl-3-methyl-2-pyrazolin-5-on; 1-Phenyl-3-methylpyrazolone-5; 3-Methyl-1-phenylpyrazol-5-one; 3-Methyl-1-phenylpyrazolin-5-one; 2 4-Dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one; NSC-12; NSC-26139; NSC-2629; 3-Methyl-1-phenylpyrazol-5(4H)-one; Norantipyrine; Radicut
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Phase change data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • IR Spectrum
  • Mass spectrum (electron ionization)
• Options:
  • Switch to SI units

Phase change data

Go To: Top, Gas phase ion energetics data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Robert L. Brown and Stephen E. Stein

Reduced pressure boiling point

Gas phase ion energetics data

Go To: Top, Phase change data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Sharon G. Lias and Joel F. Liebman

Ionization energy determinations

References

Go To: Top, Phase change data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

Vondrak, Bastl, et al., 1988
Vondrak, T.; Bastl, Z.; Bohm, S., Gas-phase tautomerism in 2,4-dihydropyrazol-3-ones: An ultraviolet photoelectron spectroscopic study and MNDO molecular orbital calculations, J. Am. Chem. Soc., 1988, 641. [all data]

Notes

Go To: Top, Phase change data, Gas phase ion energetics data, References

• Symbols used in this document:
  

  Tboil

  Boiling point

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
• The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
• Customer support for NIST Standard Reference Data products.