(S)-Mephenytoin

Name: (S)-Mephenytoin
Brand: Zemixal
SKU: ZX-031835

Reference StandardAvailable on request

Buy (S)-Mephenytoin (CAS 70989-04-7) from Zemixal. Lab and bulk packs, batch COA, fast global delivery. Part of our API Impurities range.

Pack sizes

CAS number70989-04-7

FormulaC₁₂H₁₄N₂O₂

Molar mass218.25 g/mol

Physical formSolid

HS code38229090

InChIKeyGMHKMTDVRCWUDX-LBPRGKRZSA-N

IUPAC name(5S)-5-ethyl-3-methyl-5-phenylimidazolidine-2,4-dione

About (S)-Mephenytoin

(S)-Mephenytoin is supplied by Zemixal as a characterised reference material for Phenytoin analysis. Key data (Reference Standard): CAS 70989-04-7, formula C12H14N2O2 and molar mass 218.25 g/mol. It is handled as a solid.

Common uses in the lab and plant

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

Safe handling

It carries the GHS signal word Warning (H302, H315, H319 and H335), so wear gloves and eye protection and work with good ventilation.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. You receive a certificate of analysis with characterisation data with each order. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Phenytoin

See every impurity, metabolite and related compound we list for this API.

Phenytoin standards

Typical uses

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

Applications

Pharmaceutical Manufacturing and QC Research Labs and Universities

Specifications and identifiers

Specifications of (S)-Mephenytoin
Product name	(S)-Mephenytoin
Catalogue number	ZX-031835
CAS number	70989-04-7
IUPAC name	(5S)-5-ethyl-3-methyl-5-phenylimidazolidine-2,4-dione
Molecular formula	C₁₂H₁₄N₂O₂
Molar mass	218.25 g/mol
Exact mass	218.1055
Grade	Reference Standard
Physical form	Solid
XLogP3	1.5
H-bond donors / acceptors	1 / 2
Topological polar surface area	49.4 Å²
HS code	38229090
InChIKey	GMHKMTDVRCWUDX-LBPRGKRZSA-N
SMILES	CC[C@@]1(C(=O)N(C(=O)N1)C)C2=CC=CC=C2
PubChem CID	107921
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

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

Irritant or harmful

Signal word Warning

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 summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of (S)-Mephenytoin
10 mg	Quoted on request
25 mg	Quoted on request
50 mg	Quoted on request
100 mg	Quoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about (S)-Mephenytoin

Which CAS number identifies (S)-Mephenytoin?

(S)-Mephenytoin is registered under CAS 70989-04-7. You may also see it listed as (+)-Mephenytoin, (+)-Mesantoin, d-Mephenytoin. Our catalogue number for this item is ZX-031835.

What are the formula and molar mass of (S)-Mephenytoin?

For (S)-Mephenytoin, its formula is C12H14N2O2 and its molar mass is 218.25 g/mol. The systematic (IUPAC) name is (5S)-5-ethyl-3-methyl-5-phenylimidazolidine-2,4-dione. InChIKey GMHKMTDVRCWUDX-LBPRGKRZSA-N lets you match it in any structure database.

How is (S)-Mephenytoin used in pharmaceutical QC?

(S)-Mephenytoin is a characterised reference material linked to Phenytoin. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.

What grade and pack sizes are available for (S)-Mephenytoin?

This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.

Which documents come with (S)-Mephenytoin?

Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.

Can Zemixal ship (S)-Mephenytoin to my country?

Yes. Because (S)-Mephenytoin is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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