2-Oxo-2,3-dihydrobenzo[d]oxazole-5-carboxylic acid CAS 65422-72-2
| CAS No. | 65422-72-2 |
| Molecular Formula | C8H5NO4 |
| Molecular Weight | 179.13 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.
2-Oxo-2,3-dihydrobenzo[d]oxazole-5-carboxylic acid (CAS 65422-72-2), molecular formula C8H5NO4 and molecular weight 179.13 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C8H5NO4, 2-Oxo-2,3-dihydrobenzo[d]oxazole-5-carboxylic acid contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 179.13 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO manufactures 2-Oxo-2,3-dihydrobenzo[d]oxazole-5-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 | C8H5NO4 |
| Molecular Weight | 179.13 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.) | 1975 |
| Nitrogen Atoms | 1 |
Related Oxo Standards
- 2-Oxo-2,3-dihydrobenzo[d]oxazole-4-carboxylic acid (CAS 100960-55-2)
- 2-Oxo-2,3-dihydrobenzo[d]oxazole-6-carboxylic Acid (CAS 54903-16-1)
- 2,3-Dihydrobenzo[b][1,4]dioxine-2-carboxamide (CAS 33070-04-1)
- 2,3-Dihydrobenzo[b][1,4]dioxine-5-carboxamide (CAS 349550-81-8)
- 2,3-Dihydrobenzo[b][1,4]dioxine-6-carbaldehyde oxime (CAS 31127-39-6)
- 2-Oxo-2,3-dihydrobenzo[d]thiazole-6-carbaldehyde (CAS 438634-98-1)
- (R)-1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethan-1-amine (CAS 1157581-13-9)
- (S)-1-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)ethan-1-amine (CAS 1212163-78-4)
Recommended Standards
- 2-Nitroterephthalaldehyde (CAS 39909-72-3)
- 2-Nitrobenzofuran-7-ol (CAS 40739-73-9)
- 3-(Furan-2-yl)isoxazole-5-carboxylic acid (CAS 901927-31-9)
- 2-Nitrobenzofuran-6-ol (CAS 40739-72-8)
- Methyl (4-bromo-3-methylphenyl)carbamate (CAS 51661-29-1)
- 4-(1,2,2-Triphenylvinyl)aniline (CAS 919789-80-3)
- 2-(4-Chloropyridin-2-yl)-1-phenylethanone (CAS 588729-06-0)
- 2-Phenyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazole (CAS 936901-98-3)
- 2-chloro-1-(2-hydroxy-3,4-dimethoxyphenyl)ethanone (CAS 7507-92-8)
- Methyl 2-(chloromethyl)-4-oxo-3,4-dihydroquinazoline-5-carboxylate (CAS 1140964-67-5)
- Sodium 2-chloroethanesulfonatehydrate (CAS 1089719-72-1)
- 4-(4-Methoxyphenyl)-2-(2-morpholinoethyl)-6-phenylpyridazin-3(2H)-one (CAS 23338-49-0)
- 2-(4-Nonylpiperidin-1-yl)ethan-1-ol (CAS 790603-84-8)
- Peptide 437 (CAS CATO-CPTD788437)
Why CATO?
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