(S)-Mephenytoin

Name: (S)-Mephenytoin
Brand: Vaqora Chemicals
SKU: VQ-033163

About (S)-Mephenytoin

Listed under CAS 70989-04-7, (S)-Mephenytoin is an impurity of Phenytoin available from Vaqora Chemicals. The compound has the formula C12H14N2O2, corresponding to a molecular weight of 218.25 g/mol. The IUPAC name is (5S)-5-ethyl-3-methyl-5-phenylimidazolidine-2,4-dione. It is also known as (+)-Mephenytoin or (+)-Mesantoin.

The product is provided as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

As a characterised impurity of Phenytoin, it is used for analytical method development, method validation (AMV) and routine quality-control testing, and it supports ANDA and DMF regulatory filings. Our customers for this product work in 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

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Industries

Related to Phenytoin

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

Phenytoin impurities

Specifications & identifiers

Chemical identifiers
Product name	(S)-Mephenytoin
Catalogue No.	VQ-033163
CAS Number	70989-04-7
IUPAC name	(5S)-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-LBPRGKRZSA-N
SMILES	CC[C@@]1(C(=O)N(C(=O)N1)C)C2=CC=CC=C2
PubChem CID	107921

Physical properties
Physical form	Solid
LogP (XLogP3)	1.5
H-bond donors / acceptors	1 / 2
TPSA	49.4 Å²
Synonyms	(+)-Mephenytoin, (+)-Mesantoin, d-Mephenytoin, Mephenytoin, (+)-, Mephenytoin, D-, 2,4-Imidazolidinedione, 5-ethyl-3-methyl-5-phenyl-, (5S)-, 2,4-Imidazolidinedione, 5-ethyl-3-methyl-5-phenyl-, (S)-, (S)-5-ethyl-3-methyl-5-phenylimidazolidine-2,4-dione, (S)-5-Ethyl-3-methyl-5-phenylhydantoin

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 (S)-Mephenytoin?

The CAS Registry Number of (S)-Mephenytoin is 70989-04-7. It is also known as (+)-Mephenytoin, (+)-Mesantoin, d-Mephenytoin.

What is the molecular formula and molecular weight of (S)-Mephenytoin?

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

What is (S)-Mephenytoin used for?

(S)-Mephenytoin is supplied as a characterised reference material related to Phenytoin. 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 (S)-Mephenytoin can I order?

We supply (S)-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 (S)-Mephenytoin?

Yes. Every lot of (S)-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 (S)-Mephenytoin be shipped internationally?

Yes. (S)-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.