Chemical identity

Phenytoin EP Impurity F / Phenytoin BP Impurity F

CAS 51169-17-6 · C16H14N2O2

01Identity

Identifiers and names for this exact compound. Empty fields are left unassigned.

Lazychem IDLC-25173
PubChem CID92334
NamePhenytoin EP Impurity F / Phenytoin BP Impurity F
CAS RN51169-17-6
Molecular formulaC16H14N2O2
Molecular weight266.29 g/mol
IUPAC name5-(4-Methylphenyl)-5-phenylimidazolidine-2,4-dione
InChIKeyWPAPSGQWYNPWCZ-UHFFFAOYSA-N

02Structure identifiers

2D structurePubChem CID 92334
Two-dimensional chemical structure of Phenytoin EP Impurity F / Phenytoin BP Impurity F, CAS 51169-17-6
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 3 rings, includes aromatic atoms, includes aliphatic carbon. These statements are calculated from the published structure string.

Defined stereocentres0
Unassigned stereocentres1
Ring count3
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCC1=CC=C(C=C1)C2(C(=O)NC(=O)N2)C3=CC=CC=C3
InChINot listed
Formula from structureC16H14N2O2
Molecular weight from structure266.29 g/mol

03Stereochemistry

The published structure contains 0 defined and 1 unassigned tetrahedral stereocentre. The exact wedge and dash depiction is shown above.

Defined centres0Structure assigned
Unassigned centres1Structure unspecified
Assignment statusUnassignedExact published identity
Tetrahedral upper bound≤ 2Before symmetry reduction

Published same-connectivity configurations

1 record

These records have the same connectivity, molecular formula and protonation layer, but a different complete InChIKey stereochemical layer. Only separately structure-linked records are shown.

No additional structure-linked configuration with the same connectivity is currently present in the LazyChem dataset.

Scope: The mathematical 2^n value is only an upper bound. Symmetry and other stereogenic elements can change the number of distinct stereoisomers. A hypothetical configuration is not published as a compound record without a verified structure identity.

04India status for this compound

These results apply only to this exact compound name and CAS number. Confirm the current official instruments before making a regulatory decision.

NDPS / RCSNO EXACT MATCH FOUNDCAS 51169-17-6 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 51169-17-6 has no exact match in the reviewed SCOMET list.
Review date2026-08-01Recheck the current official instruments for the material, concentration, activity and date in question.

05Names and relationships

Associated parent compound

Phenytoin

View API and impurity family

Other names

  • Phenytoin EP Impurity F
  • 5-(p-Methylphenyl)-5-phenylhydantoin
  • 5-Phenyl-5-(p-tolyl)imidazolidine-2,4-dione
  • 5-Phenyl-5-(p-tolyl)hydantoin
  • (+/-)-5-(4-METHYLPHENYL)-5-PHENYL HYDANTOIN
  • Phenytoin BP Impurity F

Related records from the same parent family

06Documented history

Dated discovery, occurrence, use and issue claims are published only when a suitable primary or government source is available.

No dated history available

No verified discovery, first report, occurrence, use or issue event is currently available for this identity.

07Sources