3-Methylisoxazole-4-carboxylic Acid

Name: 3-Methylisoxazole-4-carboxylic Acid
Brand: Zemixal
SKU: ZX-021971

Reference StandardAvailable on request

3-Methylisoxazole-4-carboxylic Acid (CAS 17153-20-7) supplier Zemixal. Lab and bulk packs, batch COA, fast global delivery.

Pack sizes

3-Methylisoxazole-4-carboxylic Acid chemical structure

CAS number17153-20-7

FormulaC₅H₅NO₃

Molar mass127.1 g/mol

Physical formSolid

HS code38229090

InChIKeyYBLSBWHFPXDRHC-UHFFFAOYSA-N

IUPAC name3-methyl-1,2-oxazole-4-carboxylic acid

About 3-Methylisoxazole-4-carboxylic Acid

3-Methylisoxazole-4-carboxylic Acid belongs to the Leflunomide reference-standard family in the Zemixal catalogue. Key data (Reference Standard): CAS 17153-20-7, formula C5H5NO3 and molar mass 127.1 g/mol. It is handled as a solid.

Where it is used

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

Storage and safety notes

Hazard communication follows GHS (Warning: H315, H319 and H335). Our SDS lists exposure controls and first-aid measures.

Order it in 10 mg, 25 mg, 50 mg and 100 mg packs or ask for a bulk quotation. Each lot travels with a certificate of analysis with characterisation data. Request pricing online and we confirm availability, documentation and freight to your country.

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 3-Methylisoxazole-4-carboxylic Acid
Product name	3-Methylisoxazole-4-carboxylic Acid
Catalogue number	ZX-021971
CAS number	17153-20-7
IUPAC name	3-methyl-1,2-oxazole-4-carboxylic acid
Molecular formula	C₅H₅NO₃
Molar mass	127.1 g/mol
Exact mass	127.0269
Grade	Reference Standard
Physical form	Solid
XLogP3	0.3
H-bond donors / acceptors	1 / 4
Topological polar surface area	63.3 Å²
HS code	38229090
InChIKey	YBLSBWHFPXDRHC-UHFFFAOYSA-N
SMILES	CC1=NOC=C1C(=O)O
PubChem CID	4589692
Synonyms	3-methyl-4-isoxazolecarboxylic acid, 4-Isoxazolecarboxylic acid, 3-methyl-, 3-Methyl-4, methylisoxazole-4-carboxylic acid, 3-methylisoxazole-s-carboxylic acid

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 3-Methylisoxazole-4-carboxylic Acid
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 3-Methylisoxazole-4-carboxylic Acid

Which CAS number identifies 3-Methylisoxazole-4-carboxylic Acid?

3-Methylisoxazole-4-carboxylic Acid is registered under CAS 17153-20-7. You may also see it listed as 3-methyl-4-isoxazolecarboxylic acid, 4-Isoxazolecarboxylic acid, 3-methyl-, 3-Methyl-4. Our catalogue number for this item is ZX-021971.

What are the formula and molar mass of 3-Methylisoxazole-4-carboxylic Acid?

For 3-Methylisoxazole-4-carboxylic Acid, its formula is C5H5NO3 and its molar mass is 127.1 g/mol. The systematic (IUPAC) name is 3-methyl-1,2-oxazole-4-carboxylic acid. InChIKey YBLSBWHFPXDRHC-UHFFFAOYSA-N lets you match it in any structure database.

How is 3-Methylisoxazole-4-carboxylic Acid used in pharmaceutical QC?

3-Methylisoxazole-4-carboxylic Acid 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 3-Methylisoxazole-4-carboxylic Acid?

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 3-Methylisoxazole-4-carboxylic Acid?

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 3-Methylisoxazole-4-carboxylic Acid to my country?

Yes. Because 3-Methylisoxazole-4-carboxylic Acid 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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