5-Chloro-6H-anthra[1,9-cd]isoxazol-6-one CAS 70730-92-6
| CAS No. | 70730-92-6 |
| Molecular Formula | C14H6ClNO2 |
| Molecular Weight | 255.66 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Chloro-6H-anthra[1,9-cd]isoxazol-6-one (CAS 70730-92-6), molecular formula C14H6ClNO2 and molecular weight 255.66 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-Chloro-6H-anthra[1,9-cd]isoxazol-6-one (C14H6ClNO2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. 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 255.66 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
As a certified reference material (CRM), 5-Chloro-6H-anthra[1,9-cd]isoxazol-6-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 | C14H6ClNO2 |
| Molecular Weight | 255.66 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
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- 1-(2-chlorophenyl)-5-(difluoromethyl)-3-methyl-1H-pyrazole-4-carboxylic acid (CAS 1375473-93-0)
- 3,3,3-Trifluoro-2-(4-(trifluoromethoxy)phenoxy)propan-1-amine (CAS 886764-40-5)
- 3-Amino-6-cyanobenzofuran-2-carboxylic acid (CAS 1823903-87-2)
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- Sodium orthophosphate dodecahydrate (CAS 10101-89-0)
- 4-((4-Bromophenyl)thio)-N,N-dimethyl-6-(trifluoromethyl)pyrimidin-2-amine (CAS 338792-30-6)
- Angiotensin III Antipeptide (CAS 133605-55-7)
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