Mephenytoin

Name: Mephenytoin
Brand: Vaqora Chemicals
SKU: VQ-043469

About Mephenytoin

Listed under CAS 50-12-4, Mephenytoin is a high-purity reference standard of Mephenytoin available from Vaqora Chemicals. With the molecular formula C12H14N2O2, it has a molar mass of 218.25 g/mol. Its systematic (IUPAC) name is 5-ethyl-3-methyl-5-phenylimidazolidine-2,4-dione. Alternative names: Mesantoin and Methoin.

It is supplied as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. It carries the GHS signal word “Warning” with 4 hazard statements. Review the Safety Data Sheet before use.

Laboratories use this Mephenytoin standard for identity and assay testing, system suitability checks and method validation supporting ANDA and DMF filings. It is used across pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Identification & assay
Method development & validation
QC reference material

Industries

Related to Mephenytoin

View every impurity, metabolite and intermediate we list for Mephenytoin.

Mephenytoin impurities

Specifications & identifiers

Chemical identifiers
Product name	Mephenytoin
Catalogue No.	VQ-043469
CAS Number	50-12-4
IUPAC name	5-ethyl-3-methyl-5-phenylimidazolidine-2,4-dione
Molecular formula	C₁₂H₁₄N₂O₂
Molecular weight	218.25 g/mol
Exact mass	218.1055
Grade	Reference Standard
HSN code	38229090
InChIKey	GMHKMTDVRCWUDX-UHFFFAOYSA-N
SMILES	CCC1(C(=O)N(C(=O)N1)C)C2=CC=CC=C2
PubChem CID	4060

Physical properties
Physical form	Solid
LogP (XLogP3)	1.5
H-bond donors / acceptors	1 / 2
TPSA	49.4 Å²
Synonyms	Mesantoin, Methoin, Methylphenetoin, Methyl hydantoin, Phenylethylmethylhydantoin, 3-Ethylnirvanol, Mephenytoine, 5-Ethyl-3-methyl-5-phenylhydantoin, 2,4-Imidazolidinedione, 5-ethyl-3-methyl-5-phenyl-, 3-Methyl-5,5-phenylethylhydantoin, 3-Methyl-5-ethyl-5-phenylhydantoin, 5-Ethyl-3-methyl-5-phenylimidazolidin-2,4-dione

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P330, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Mephenytoin?

The CAS Registry Number of Mephenytoin is 50-12-4. It is also known as Mesantoin, Methoin, Methylphenetoin.

What is the molecular formula and molecular weight of Mephenytoin?

Mephenytoin has the molecular formula C12H14N2O2 and a molecular weight of 218.25 g/mol. Its IUPAC name is 5-ethyl-3-methyl-5-phenylimidazolidine-2,4-dione.

What is Mephenytoin used for?

Mephenytoin is supplied as a characterised reference material related to Mephenytoin. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Mephenytoin can I order?

We supply Mephenytoin in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Mephenytoin?

Yes. Every lot of Mephenytoin is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Mephenytoin be shipped internationally?

Yes. Mephenytoin is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.