8-(2,4-Dihydroxyphenyl)-7-hydroxy-2-(2-hydroxy-4-oxocyclohexa-2,5-dien-1-ylidene)-2H-phenoxazin-3(10H)-one CAS 71939-12-3
| CAS No. | 71939-12-3 |
| Molecular Formula | C24H15NO7 |
| Molecular Weight | 429.38 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
8-(2,4-Dihydroxyphenyl)-7-hydroxy-2-(2-hydroxy-4-oxocyclohexa-2,5-dien-1-ylidene)-2H-phenoxazin-3(10H)-one (CAS 71939-12-3), molecular formula C24H15NO7 and molecular weight 429.38 g/mol, is a CATO reference standard with documented purity and traceability.
8-(2,4-Dihydroxyphenyl)-7-hydroxy-2-(2-hydroxy-4-oxocyclohexa-2,5-dien-1-ylidene)-2H-phenoxazin-3(10H)-one (C24H15NO7) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. 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).
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), 8-(2,4-Dihydroxyphenyl)-7-hydroxy-2-(2-hydroxy-4-oxocyclohexa-2,5-dien-1-ylidene)-2H-phenoxazin-3(10H)-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 | C24H15NO7 |
| Molecular Weight | 429.38 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, 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 |
| Degree of Unsaturation (DBE) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Nitrogen Atoms | 1 |
Related Dihydroxyphenyl Standards
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Recommended Standards
- 3,3'-Disulfanediylbis(N-(2-chlorophenyl)propanamide) (CAS 33312-23-1)
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- 2-(2-(3-(4-Nitrophenyl)-5-oxo-1-phenyl-1,5-dihydro-4H-pyrazol-4-ylidene)hydrazinyl)benzoic acid (CAS 314763-48-9)
- 1-Benzoyl-3-(1-ethoxyethoxy)-4-phenyl-2-azetidinone (CAS 133066-61-2)
- 3-Methyl-1-(4-nitrophenyl)-4-(3-(trifluoromethyl)phenyl)-1H-pyrazol-5-amine (CAS 852690-94-9)
- Di-tert-butyl (((2-aminoethyl)azanediyl)bis(ethane-2,1-diyl))dicarbamate (CAS 161038-11-5)
- 3-{[(2-oxo-2,3-dihydro-1h-1,3-benzodiazol-5-yl)amino]methyl}benzonitrile (CAS 1038223-14-1)
- 4-Bromothiophene-2-ethanamine Hydrochloride (CAS 1172469-40-7)
- 95-00-1 Benzenemethanamine, 2,4-dichloro- Benzylamine, 2,4-dichloro- (8CI) 2,4-Dichlorobenzylamine EINECS 202-382-6 NSC 25064 (CAS 95-00-1)
- 2-(4-Chloro-3-methylphenyl)-3-thioxohexahydroimidazo[1,5-a]pyridin-1(5H)-one (CAS 60726-03-6)
- 1-(4-Bromo-3-chlorophenyl)pyridin-2(1H)-one (CAS 2485732-75-8)
- 1-((4-Nitrophenyl)carbamoyl)piperidine-4-carboxylic acid (CAS 926227-42-1)
- Tirzepatide Impurity 21 X TFA Salt (CAS CATO-C4X-324021)
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