5-Methylisoxazole-4-carboxylic acid, 97%
Buy 5-Methylisoxazole-4-carboxylic acid, 97% (CAS 42831-50-5) from Zemixal: C5H5NO3, COA and SDS with every lot, worldwide shipping.
About 5-Methylisoxazole-4-carboxylic acid, 97%
5-Methylisoxazole-4-carboxylic acid, 97% sits in our other Heterocyclic Building Blocks section and ships worldwide from stock or short lead time. Identity at a glance (97%): CAS 42831-50-5, formula C5H5NO3 and molar mass 127.1 g/mol. Expect white to light yellow powder or crystals.
Typical applications
- Organic synthesis
- API synthesis
Handling and storage
Physical constants on file: melting point 145.0 to 149.0 °C. Hazard communication follows GHS (Danger: H302, H315, H318 and H319). Our SDS lists exposure controls and first-aid measures.
Available as 5 g and 25 g. Larger or split packs can be arranged. Each lot travels with a batch certificate of analysis and a 16-section SDS. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.
Typical uses
- Organic synthesis
- API synthesis
Applications
Specifications and identifiers
| Product name | 5-Methylisoxazole-4-carboxylic acid, 97% |
|---|---|
| Catalogue number | ZX-011733 |
| CAS number | 42831-50-5 |
| IUPAC name | 5-methyl-1,2-oxazole-4-carboxylic acid |
| Molecular formula | C5H5NO3 |
| Molar mass | 127.1 g/mol |
| Exact mass | 127.0269 |
| Purity / assay | 97% |
| Physical form | Crystalline |
| Appearance | White to light yellow powder or crystals |
| Melting point | 145.0 to 149.0 °C |
| XLogP3 | 0.3 |
| H-bond donors / acceptors | 1 / 4 |
| Topological polar surface area | 63.3 Ų |
| HS code | 29420090 |
| InChIKey | VQBXUKGMJCPBMF-UHFFFAOYSA-N |
| SMILES | CC1=C(C=NO1)C(=O)O |
| PubChem CID | 1425240 |
| Synonyms | 4-Isoxazolecarboxylic acid, 5-methyl-, 5-Methyl-4-isoxazolecarboxylic acid, 5-Methylisoxazole-4-carboxylicacid, 5-methyl-isoxazole-4-carboxylic acid, 5-Methylisoxazol-4-yl carboxylic acid, 5-methyl-1,2-oxazole -4-carboxylic acid |
Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.
Safety and GHS hazards
Signal word Danger
- H302Harmful if swallowed
- H315Causes skin irritation
- H318Causes serious eye damage
- 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, P305 + P354 + P338, P317, 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
| 5 g | Quoted on request | |
| 25 g | Quoted on request |
Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.
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- CAS
- 480424-76-8
- Formula
- C11H14BrMgNO
- MW
- 280.44 g/mol
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