6-(3,4-Dihydro-2H-benzo[b][1,4]dioxepin-7-yl)-3-ethylisoxazolo[5,4-b]pyridine-4-carboxylic acid CAS 1263217-07-7
| CAS No. | 1263217-07-7 |
| Molecular Formula | C18H16N2O5 |
| Molecular Weight | 340.33 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
6-(3,4-Dihydro-2H-benzo[b][1,4]dioxepin-7-yl)-3-ethylisoxazolo[5,4-b]pyridine-4-carboxylic acid (CAS 1263217-07-7), molecular formula C18H16N2O5 and molecular weight 340.33 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 6-(3,4-Dihydro-2H-benzo[b][1,4]dioxepin-7-yl)-3-ethylisoxazolo[5,4-b]pyridine-4-carboxylic acid (C18H16N2O5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 340.33 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 6-(3,4-Dihydro-2H-benzo[b][1,4]dioxepin-7-yl)-3-ethylisoxazolo[5,4-b]pyridine-4-carboxylic acid 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 | C18H16N2O5 |
| Molecular Weight | 340.33 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 DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 2 |
Related Dihydro Standards
- 3-(3,4-Dihydro-2H-benzo[b][1,4]dioxepin-7-yl)-5,7-dihydroxy-2-methyl-4H-chromen-4-one (CAS 169903-86-0)
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Recommended Standards
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- Methyl (2r,3s)-2-((tert-butoxycarbonyl)amino)-3-hydroxy-3-(4-nitrophenyl)propanoate (CAS 1391398-46-1)
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- 2-Bromo-3-hydroxyisonicotinic acid (CAS 1196152-10-9)
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- 506-87-6 PDP691CN28 Ammonium carbonate Diammonium carbonate Carbonic acid, diammonium salt Carbonic acid, ammonium salt (1:2) AI3-25347 Ammonia sesquicarbonate Ammoniumcarbonat [German] Carbonate d'ammoniaque [French] Caswell No. 042 CCRIS 7328 EINECS 208-058-0 EPA Pesticide Chemical Code 073501 HSDB 6305 Ammoniumcarbonat Carbonate d'ammoniaque UNII-PDP691CN28 Crystal ammonia Ammonium carbonicum EC 208-058-0 (CAS 506-87-6)
- Ganirelix 1-4 peptide (CAS 208599-57-9)
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