5-Methylbenzo[d]oxazole-2-carboxylic acid CAS 49559-66-2
| CAS No. | 49559-66-2 |
| Molecular Formula | C9H7NO3 |
| Molecular Weight | 177.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO supplies 5-Methylbenzo[d]oxazole-2-carboxylic acid (CAS 49559-66-2), a certified reference material (molecular formula C9H7NO3, MW 177.16 g/mol) for analytical method development and quality control.
5-Methylbenzo[d]oxazole-2-carboxylic acid (C9H7NO3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures 5-Methylbenzo[d]oxazole-2-carboxylic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H7NO3 |
| Molecular Weight | 177.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Nitrogen Atoms | 1 |
Related Methylbenzo Standards
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- 3-Methylbenzo[d]isoxazole-5-carboxylic acid (CAS 478169-74-3)
- 3-Methylbenzo[d]isoxazole-6-carboxylic acid (CAS 478169-72-1)
- 4-Methylbenzo[d]thiazole-2-carbaldehyde (CAS 1378818-79-1)
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Recommended Standards
- 5-Methyl-6-nitroindazole (CAS 72521-00-7)
- 5-methylfuro[3,2-b]pyridine-2-carboxylic acid (CAS 66497-45-8)
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- 5-Methylpyrazolo[1,5-a]pyrimidine-3-carboxylic acid (CAS 62908-85-4)
- 3-Bromo-1-phenylprop-2-yn-1-ol (CAS 10508-57-3)
- 4-(Difluoromethyl)-2-fluoro-5-methyl-3-(trifluoromethyl)pyridine (CAS 1806927-17-2)
- L-Alanine Diethylamide Hydrochloride (CAS 946828-58-6)
- Methyltartronic Acid Diethyl Ester Benzoate (CAS 111588-71-7)
- (E)-1,2-Bis(4-fluoro-5-(trimethylsilyl)thiophen-2-yl)ethene (CAS 2205860-41-7)
- 3-(1H-Benzo[d]imidazol-2-yl)-[1,2,4]triazino[4,3-b]indazol-4-amine (CAS 61884-83-1)
- 2-[7-(3-Propyl-1,2,4-oxadiazol-5-yl)-[1,2,4]triazolo[4,3-a]pyridin-3-yl]acetic acid (CAS 1338666-46-8)
- 5-Bromo-3-iodo-N-methylpyridin-2-amine (CAS 1476713-49-1)
- 2-Nitro-5-(piperidin-1-yl)aniline (CAS 54997-99-8)
- Fas C- Terminal Tripeptide (CAS 189109-90-8)
Why CATO?
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