5-Methoxybenzoxazol-2(3H)-one CAS 40925-63-1
| CAS No. | 40925-63-1 |
| Molecular Formula | C8H7NO3 |
| Molecular Weight | 165.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Methoxybenzoxazol-2(3H)-one is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5-Methoxybenzoxazol-2(3H)-one (CAS 40925-63-1) is a high-purity analytical reference standard with the molecular formula C8H7NO3 and a molecular weight of 165.15 g/mol.
5-Methoxybenzoxazol-2(3H)-one (C8H7NO3) 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. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-Methoxybenzoxazol-2(3H)-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C8H7NO3 |
| Molecular Weight | 165.15 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Nitrogen Atoms | 1 |
Recommended Standards
- 5-Methoxybenzo[d]isoxazol-3-ol (CAS 66607-95-2)
- 5-methyl-1,7-dihydropyrrolo[2,3-d]pyrimidine-2,4-dione (CAS 67856-03-5)
- 5-Methoxybenzo[c]isoxazol-3(1H)-one (CAS 773851-02-8)
- 5-Nitro-1,3-dihydroisobenzofuran (CAS 52771-99-0)
- N-(1-Isobutyryl-1,2,3,4-tetrahydroquinolin-7-yl)butyramide (CAS 1005301-06-3)
- Ethyl 3,3-diethoxypropionate (CAS 10601-80-6)
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Why CATO?
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