3-Oxo-3,4-dihydrospiro[benzo[b][1,4]oxazine-2,1'-cyclopropane]-6-carboxylic acid CAS 2765502-85-8
| CAS No. | 2765502-85-8 |
| Molecular Formula | C11H9NO4 |
| Molecular Weight | 219.19 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.
3-Oxo-3,4-dihydrospiro[benzo[b][1,4]oxazine-2,1'-cyclopropane]-6-carboxylic acid (CAS 2765502-85-8), molecular formula C11H9NO4 and molecular weight 219.19 g/mol, is a CATO reference standard with documented purity and traceability.
3-Oxo-3,4-dihydrospiro[benzo[b][1,4]oxazine-2,1'-cyclopropane]-6-carboxylic acid (C11H9NO4) 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 3-Oxo-3,4-dihydrospiro[benzo[b][1,4]oxazine-2,1'-cyclopropane]-6-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 | C11H9NO4 |
| Molecular Weight | 219.19 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, 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2003 |
| Nitrogen Atoms | 1 |
Related Oxo Standards
- 3'-Methyl-2',7'-dihydrospiro[cyclohexane-1,4'-pyrazolo[3,4-b]pyridin]-6'(5'H)-one (CAS 1029475-77-1)
- 1-Methyl-1,4-dihydrospiro[indazole-5,4'-piperidin]-7(6H)-one (CAS 1332368-70-3)
- 3,4-dihydrospiro[1-benzopyran-2,4'-oxan]-4-amine (CAS 934554-45-7)
- 2,4-Dihydrospiro[1,5-benzodioxepine-3,1'-cyclopropane]-6-boronic acid (CAS 2096335-53-2)
- Ethyl 2,3-dihydrospiro[indene-1,2'-oxirane]-3'-carboxylate (CAS 67197-73-3)
- 2'-Oxo-1',2'-dihydrospiro[cyclopropane-1,3'-pyrido[2,3-b][1,4]oxazine]-7'-carboxylic acid (CAS 2765502-89-2)
- 6'-Oxo-5',6'-dihydrospiro[cyclopropane-1,7'-pyridazino[3,4-b][1,4]oxazine]-3'-carboxylic acid (CAS 2765503-12-4)
- 1',2'-dihydrospiro[cyclohexane-1,3'-pyrrolo[2,3-b]pyridine]-2',4-dione (CAS 1638768-64-5)
Recommended Standards
- 3-Hydroxy-6-methoxyquinoline-4-carboxylic acid (CAS 857758-51-1)
- 4-(2,5-Dioxopyrrolidin-1-yl)benzoic acid (CAS 60693-33-6)
- 3-Formyl-6-methoxy-1h-indole-2-carboxylic acid (CAS 858752-19-9)
- 4-(2-Chlorostyryl)quinoline (CAS 5464-25-5)
- Methyl 5,6,7,8-tetrahydroindolizine-1-carboxylate (CAS 87281-43-4)
- N-(1-chloropropan-2-yl)acetamide (CAS 817-78-7)
- 2-(2-(Difluoromethoxy)-6-hydroxybenzoyl)pyridine (CAS 1261807-58-2)
- 4-(4-Methoxybenzyl)-3-methoxybenzaldehyde (CAS 129047-38-7)
- 1-(4-Chloro-2-fluorophenyl)piperazine Dihydrochloride (CAS 1215108-68-1)
- 2-(4-cyclopropyl-4H-1,2,4-triazol-3-yl)ethan-1-amine dihydrochloride (CAS 1269151-89-4)
- 6-(Benzyloxy)picolinimidamide hydrochloride (CAS 192566-02-2)
- Ethyl 3-amino-6-chloro-2-fluorobenzoate (CAS 1103234-34-9)
- 3-(CHLOROSULFONYL)BENZOIC ACID 3-(CHLOROSULPHONYL)BENZOIC ACID 3-CARBOXYBENZENESULFONYL CHLORIDE 3-CARBOXYLBENZENESULFONYL CHLORIDE 3-Chlorosulfony benzoic acid 4025-64-3 AKOS AKM00830 AKOS BB-9469 AKOS BBS-00006994 AS00820 BENZOIC ACID, 3-(CHLOROSULFONYL)- M-(CHLOROSULFONYL) BENZOIC ACID TIMTEC-BB SBB003351 (CAS 4025-64-3)
- Semaglutide impurity 107 (CAS CATO-C4X-2226107)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com