Ethyl 5-methylisoxazole-4-carboxylate

Name: Ethyl 5-methylisoxazole-4-carboxylate
Brand: Zemixal
SKU: ZX-025322

Reference StandardAvailable on request

Buy Ethyl 5-methylisoxazole-4-carboxylate (CAS 51135-73-0) from Zemixal. Request a quote with price, lead time and documents.

Pack sizes

Ethyl 5-methylisoxazole-4-carboxylate chemical structure

CAS number51135-73-0

FormulaC₇H₉NO₃

Molar mass155.15 g/mol

Physical formSolid

HS code38229090

InChIKeyKOMSQTMQKWSQDW-UHFFFAOYSA-N

IUPAC nameethyl 5-methyl-1,2-oxazole-4-carboxylate

About Ethyl 5-methylisoxazole-4-carboxylate

Ethyl 5-methylisoxazole-4-carboxylate is supplied by Zemixal as a characterised reference material for Leflunomide analysis. Key data (Reference Standard): CAS 51135-73-0, formula C7H9NO3 and molar mass 155.15 g/mol. It is handled as a solid.

Use cases we see most often

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

Storage and safety notes

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

Order it in 10 mg, 25 mg, 50 mg and 100 mg packs or ask for a bulk quotation. Every shipment includes a certificate of analysis with characterisation data. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Leflunomide

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

Leflunomide 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 Ethyl 5-methylisoxazole-4-carboxylate
Product name	Ethyl 5-methylisoxazole-4-carboxylate
Catalogue number	ZX-025322
CAS number	51135-73-0
IUPAC name	ethyl 5-methyl-1,2-oxazole-4-carboxylate
Molecular formula	C₇H₉NO₃
Molar mass	155.15 g/mol
Exact mass	155.0582
Grade	Reference Standard
Physical form	Solid
XLogP3	1
H-bond donors / acceptors	0 / 4
Topological polar surface area	52.3 Å²
HS code	38229090
InChIKey	KOMSQTMQKWSQDW-UHFFFAOYSA-N
SMILES	CCOC(=O)C1=C(ON=C1)C
PubChem CID	7009317
Synonyms	Ethyl-5-methyl isoxazole carboxylic acid, Ethyl 5-methyl-4-isoxazolecarboxylate, Ethyl 5-m+C3117ethyl-4-isoxazolecarboxylate, Ethyl 5-methylisoxazol-4-yl carboxylate, 4-Isoxazolecarboxylic acid, 5-methyl-, ethyl ester

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

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, 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 Ethyl 5-methylisoxazole-4-carboxylate
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 Ethyl 5-methylisoxazole-4-carboxylate

Which CAS number identifies Ethyl 5-methylisoxazole-4-carboxylate?

Ethyl 5-methylisoxazole-4-carboxylate is registered under CAS 51135-73-0. You may also see it listed as Ethyl-5-methyl isoxazole carboxylic acid, Ethyl 5-methyl-4-isoxazolecarboxylate, Ethyl 5-m+C3117ethyl-4-isoxazolecarboxylate. Our catalogue number for this item is ZX-025322.

What are the formula and molar mass of Ethyl 5-methylisoxazole-4-carboxylate?

For Ethyl 5-methylisoxazole-4-carboxylate, its formula is C7H9NO3 and its molar mass is 155.15 g/mol. The systematic (IUPAC) name is ethyl 5-methyl-1,2-oxazole-4-carboxylate. InChIKey KOMSQTMQKWSQDW-UHFFFAOYSA-N lets you match it in any structure database.

How is Ethyl 5-methylisoxazole-4-carboxylate used in pharmaceutical QC?

Ethyl 5-methylisoxazole-4-carboxylate is a characterised reference material linked to Leflunomide. 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 Ethyl 5-methylisoxazole-4-carboxylate?

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 Ethyl 5-methylisoxazole-4-carboxylate?

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 Ethyl 5-methylisoxazole-4-carboxylate to my country?

Yes. Because Ethyl 5-methylisoxazole-4-carboxylate 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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