API Process Intermediates & Related Compounds

Isoxazole-4-carboxylic acid

Name: Isoxazole-4-carboxylic acid
Brand: Zemixal
SKU: ZX-041194

Available on request

Buy Isoxazole-4-carboxylic acid (CAS 6436-62-0) from Zemixal. Request a quote with price, lead time and documents. Quotes within one business day.

Pack sizes

Isoxazole-4-carboxylic acid chemical structure

CAS number6436-62-0

FormulaC₄H₃NO₃

Molar mass113.07 g/mol

Physical formSolid

HS code2933

InChIKeyLYPXTDXYEQEIIN-UHFFFAOYSA-N

IUPAC name1,2-oxazole-4-carboxylic acid

About Isoxazole-4-carboxylic acid

Isoxazole-4-carboxylic acid sits in our API Process Intermediates & Related Compounds section and ships worldwide from stock or short lead time. Key data: CAS 6436-62-0, formula C4H3NO3 and molar mass 113.07 g/mol. It is handled as a solid.

Common uses in the lab and plant

API route development
Impurity fate & purge studies
Analytical method development

Safe handling

Classified under GHS with signal word Warning and hazard statements H302, H315, H319 and H335. Read the SDS before first use.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. Every shipment includes a batch certificate of analysis and a 16-section SDS. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

Reference standards for Tretinoin

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

Tretinoin standards

Typical uses

API route development
Impurity fate & purge studies
Analytical method development

Applications

Pharmaceutical Manufacturing and QC Research Labs and Universities

Specifications and identifiers

Specifications of Isoxazole-4-carboxylic acid
Product name	Isoxazole-4-carboxylic acid
Catalogue number	ZX-041194
CAS number	6436-62-0
IUPAC name	1,2-oxazole-4-carboxylic acid
Molecular formula	C₄H₃NO₃
Molar mass	113.07 g/mol
Exact mass	113.0113
Physical form	Solid
XLogP3	-0.1
H-bond donors / acceptors	1 / 4
Topological polar surface area	63.3 Å²
HS code	2933
InChIKey	LYPXTDXYEQEIIN-UHFFFAOYSA-N
SMILES	C1=C(C=NO1)C(=O)O
PubChem CID	3014488
Synonyms	4-Isoxazolecarboxylic acid, Isooxazole-4-carboxylic acid, 4-carboxy isoxazole, isoxazole-4-carboxylic acid, AldrichCPR, 4-Carboxyisoxazole, 1,2-Oxazole-4-carboxylic acid, 4-Carboxy-1,2-oxazole

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 Isoxazole-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 Isoxazole-4-carboxylic acid

Which CAS number identifies Isoxazole-4-carboxylic acid?

Isoxazole-4-carboxylic acid is registered under CAS 6436-62-0. You may also see it listed as 4-Isoxazolecarboxylic acid, Isooxazole-4-carboxylic acid, 4-carboxy isoxazole. Our catalogue number for this item is ZX-041194.

What are the formula and molar mass of Isoxazole-4-carboxylic acid?

For Isoxazole-4-carboxylic acid, its formula is C4H3NO3 and its molar mass is 113.07 g/mol. The systematic (IUPAC) name is 1,2-oxazole-4-carboxylic acid. InChIKey LYPXTDXYEQEIIN-UHFFFAOYSA-N lets you match it in any structure database.

How is Isoxazole-4-carboxylic acid used in pharmaceutical QC?

Isoxazole-4-carboxylic acid is a characterised reference material linked to Tretinoin. 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 Isoxazole-4-carboxylic acid?

The grade and assay are confirmed on the quotation and the batch COA. 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 Isoxazole-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 Isoxazole-4-carboxylic acid to my country?

Yes. Because Isoxazole-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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