Phenytoin

CAS Registry Number®

57-41-0

CAS Name

Phenytoin

Molecular Formula

C15H12N2O2

Molecular Mass

252.27

Cite this Page

Phenytoin.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/ChemicalDetail.aspx?ref=57-41-0 (retrieved 2025-07-10) (CAS RN: 57-41-0).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Melting Point (1)

    286 °C

  • Density (2)

    1.26 g/cm³

Source(s)

Other Names and Identifiers

InChI

InChI=1S/C15H12N2O2/c18-13-15(17-14(19)16-13,11-7-3-1-4-8-11)12-9-5-2-6-10-12/h1-10H,(H2,16,17,18,19)

InChIKey

InChIKey=CXOFVDLJLONNDW-UHFFFAOYSA-N

SMILES

O=C1C(NC(=O)N1)(C2=CC=CC=C2)C3=CC=CC=C3

Canonical SMILES

O=C1NC(=O)C(N1)(C=2C=CC=CC2)C=3C=CC=CC3

Other Names for this Substance

  • 2,4-Imidazolidinedione, 5,5-diphenyl-
  • Hydantoin, 5,5-diphenyl-
  • 5,5-Diphenyl-2,4-imidazolidinedione
  • Denyl
  • Dihycon

View All

Deleted or Replaced CAS Registry Numbers

125-59-7, 1061190-62-2

CAS INSIGHTSTM
Aspergillus fungus, computer illustration. This is a toxic fungus that causes diseases in humans.