Catalog Number: 3276
Chemical Name: (±)-5-Ethyl-3-methyl-5-phenyl-2,4-imidazolidinedione
Biological Activity
CYP2C19 and CYP2B6 substrate. Anticonvulsant.
Technical Data
  • M.Wt:
  • Formula:
  • Solubility:
    Soluble to 20 mM in DMSO
  • Purity:
  • Storage:
    Store at +4°C
  • CAS No:
The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis. All Tocris products are intended for laboratory research use only.
Background References
  1. Racemic and optically active hydantoins from disubstituted cyanoacetic acids.
    Knabe and Wunn
    Arch.Pharmacol., 1980;313:53
  2. CYP2C19 inhibition: the impact of substrate probe selection on in vitro inhibition profiles.
    Foti et al.
    Drug Meta. Dispos., 2008;36:523
  3. Mephenytoin as a probe for CYP2C19 phenotyping: effect of sample storage, intra-individual reproducibility and occurrence of adverse events.
    Tamminga et al.
    Br.J.Clin.Pharmacol., 2001;51:471

Have you used Mephenytoin?

Submit a review and receive a $25US/€18/£15/$25CAN amazon gift card if you include an image - $10US/€7/£6/$10CAN Amazon card for reviews without an image. Limited to verified customers in USA, Canada and Europe.

Tocris Bioscience is the leading supplier of novel and exclusive tools for life science research with over 30 years' experience in the industry. Tocris is a Bio-Techne brand.

Order Details


Contact Information


Molarity Calculator

Calculate the mass, volume, or concentration required for a solution.

*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

R&D Systems Guarantee


Customer Information