Ethyl 3-methylisoxazole-4-carboxylate

Name: Ethyl 3-methylisoxazole-4-carboxylate
Brand: Vaqora Chemicals
SKU: VQ-022942

About Ethyl 3-methylisoxazole-4-carboxylate

Listed under CAS 20328-15-8, Ethyl 3-methylisoxazole-4-carboxylate is an impurity of Leflunomide available from Vaqora Chemicals. Formula C7H9NO3, molecular weight 155.15 g/mol. Systematically, it is named ethyl 3-methyl-1,2-oxazole-4-carboxylate. It is also known as ethyl 3-methyl-4-isoxazolecarboxylate.

It is supplied as a solid. Store the standard in its sealed vial, protected from light and moisture, and follow the storage condition printed on the COA. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

This Leflunomide impurity supports analytical method development and validation (AMV), batch release testing and the impurity sections of ANDA and DMF filings. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Available in 10 mg, 25 mg, 50 mg and 100 mg packs, Ethyl 3-methylisoxazole-4-carboxylate is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

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

Industries

Related to Leflunomide

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

Leflunomide impurities

Specifications & identifiers

Chemical identifiers
Product name	Ethyl 3-methylisoxazole-4-carboxylate
Catalogue No.	VQ-022942
CAS Number	20328-15-8
IUPAC name	ethyl 3-methyl-1,2-oxazole-4-carboxylate
Molecular formula	C₇H₉NO₃
Molecular weight	155.15 g/mol
Exact mass	155.0582
Grade	Reference Standard
HSN code	38229090
InChIKey	AEWHICNMVQOWJE-UHFFFAOYSA-N
SMILES	CCOC(=O)C1=CON=C1C
PubChem CID	317668

Physical properties
Physical form	Solid
LogP (XLogP3)	1
H-bond donors / acceptors	0 / 4
TPSA	52.3 Å²

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

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 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 Ethyl 3-methylisoxazole-4-carboxylate?

The CAS Registry Number of Ethyl 3-methylisoxazole-4-carboxylate is 20328-15-8. It is also known as 3-Methylisoxazole-4-Carboxylic Acid Ethyl Ester, 4-Isoxazolecarboxylic acid, 3-methyl-, ethyl ester, ethyl 3-methyl-4-isoxazolecarboxylate.

What is the molecular formula and molecular weight of Ethyl 3-methylisoxazole-4-carboxylate?

Ethyl 3-methylisoxazole-4-carboxylate has the molecular formula C7H9NO3 and a molecular weight of 155.15 g/mol. Its IUPAC name is ethyl 3-methyl-1,2-oxazole-4-carboxylate.

What is Ethyl 3-methylisoxazole-4-carboxylate used for?

Ethyl 3-methylisoxazole-4-carboxylate is supplied as a characterised reference material related to Leflunomide. 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 Ethyl 3-methylisoxazole-4-carboxylate can I order?

We supply Ethyl 3-methylisoxazole-4-carboxylate 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 Ethyl 3-methylisoxazole-4-carboxylate?

Yes. Every lot of Ethyl 3-methylisoxazole-4-carboxylate 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 Ethyl 3-methylisoxazole-4-carboxylate be shipped internationally?

Yes. Ethyl 3-methylisoxazole-4-carboxylate 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.