2-(2-Hydroxyphenyl)benzo[d]oxazole-4-carboxylic acid CAS 906095-21-4
| CAS No. | 906095-21-4 |
| Molecular Formula | C14H9NO4 |
| Molecular Weight | 255.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-(2-Hydroxyphenyl)benzo[d]oxazole-4-carboxylic acid (CAS 906095-21-4), molecular formula C14H9NO4 and molecular weight 255.23 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, 2-(2-Hydroxyphenyl)benzo[d]oxazole-4-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 255.23 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 manufactures 2-(2-Hydroxyphenyl)benzo[d]oxazole-4-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 | C14H9NO4 |
| Molecular Weight | 255.23 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
Related Hydroxyphenyl Standards
- 2-(2-Hydroxyphenyl)-[1,2,4]triazolo[1,5-a]pyridine-8-carboxylic acid (CAS 1368386-88-2)
- 2-(4-Hydroxyphenyl)-3a,4,7,7a-tetrahydro-1h-4,7-methanoisoindole-1,3(2h)-dione (CAS 10308-54-0)
- 3-[(E)-[(2-Hydroxyphenyl)methylidene]amino]-1-phenylurea (CAS 1271144-44-5)
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- 1-(2-Hydroxyphenyl)-3-phenylpentan-1-one (CAS 93651-85-5)
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Recommended Standards
- 2-(2-(5-Nitrofuran-2-yl)vinyl)benzofuran (CAS 89266-47-7)
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- 1-Amino-2,4-dihydroxyanthracene-9,10-dione (CAS 81-51-6)
- 2,6-Di(1H-pyrazol-1-yl)isonicotinic acid (CAS 600727-96-6)
- 1-(4-Butylphenyl)ethan-1-ol (CAS 125639-56-7)
- 1,3,4,5-Tetrahydrophenanthridin-6(2H)-one (CAS 80031-06-7)
- 5-methoxy-2-(pyrrolidin-3-yl)pyridine dihydrochloride (CAS 1909317-45-8)
- Naphthalen-2-yl benzenesulfonate (CAS 15161-07-6)
- 1-(2,4-difluorophenyl)piperazine (CAS 115761-79-0)
- 1-Allyl-1H-pyrrole-2-carbonitrile (CAS 101001-69-8)
- 3-Bromo-5-(cyclopentylmethoxy)pyridine (CAS 1339683-27-0)
- 4-(Benzyloxy)-3-methyl-1H-pyrazolo[4,3-c]pyridine (CAS 1246348-84-4)
- Bosutinib Impurity 25 (CAS 98446-49-2)
- Semaglutide Impurity 5 (CAS 23406-82-8)
Why CATO?
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