4-Hydroxy-7-phenoxyisobenzofuran-1,3-dione CAS 89450-88-4
| CAS No. | 89450-88-4 |
| Molecular Formula | C14H8O5 |
| Molecular Weight | 256.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Hydroxy-7-phenoxyisobenzofuran-1,3-dione (CAS 89450-88-4), molecular formula C14H8O5 and molecular weight 256.21 g/mol, is a CATO reference standard with documented purity and traceability.
4-Hydroxy-7-phenoxyisobenzofuran-1,3-dione (C14H8O5) contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. 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).
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C14H8O5 |
| Molecular Weight | 256.21 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, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
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Recommended Standards
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- Aa-dctp (CAS 123089-82-7)
- Methyl 5-(difluoromethyl)-1-ethyl-1H-pyrazole-4-carboxylate (CAS 1443287-95-3)
- 3-Chloro-3-(1,3-dioxolan-2-yl)-5-fluorobenzophenone (CAS 898759-43-8)
- 2-Nitroethyl Benzoate (CAS 40789-79-5)
- (R)-2-Hydroxy-2’-[(S)-hydroxy(4-pyridyl)methyl]-[1,1’-binaphthalene] (CAS 1498319-67-7)
- (R)-1-(2-(Difluoromethoxy)phenyl)ethan-1-ol (CAS 1344951-26-3)
- 4-Bromo-1,6-dimethyl-1,6-dihydro-7H-pyrazolo[3,4-c]pyridin-7-one (CAS 1782578-99-7)
- 1-(4,6-Dimethylpyrimidin-2-yl)-5-oxo-2,5-dihydro-1h-pyrazole-3-carboxylic acid (CAS 1208773-19-6)
- Neuropeptide AF (human) (CAS 192387-38-5)
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