5-Isobenzofurancarboxylic acid, 1,3-dihydro-1,3-dioxo-, polymer with 1,4-cyclohexanedimethanol and 3a,4,7,7a-tetrahydro-1,3-isobenzofurandione CAS 153640-63-2
| CAS No. | 153640-63-2 |
| Molecular Formula | C9H4O5 |
| Molecular Weight | N/A |
| 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.
5-Isobenzofurancarboxylic acid, 1,3-dihydro-1,3-dioxo-, polymer with 1,4-cyclohexanedimethanol and 3a,4,7,7a-tetrahydro-1,3-isobenzofurandione (CAS 153640-63-2), molecular formula C9H4O5C8H8O3C8H16O2 and molecular weight 488.49 g/mol, is a CATO reference standard with documented purity and traceability.
5-Isobenzofurancarboxylic acid, 1,3-dihydro-1,3-dioxo-, polymer with 1,4-cyclohexanedimethanol and 3a,4,7,7a-tetrahydro-1,3-isobenzofurandione (C9H4O5C8H8O3C8H16O2) contains a flavonoid core, 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).
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 | C9H4O5 C8H8O3 C8H16O2 |
| Molecular Weight | 488.49 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
Related Isobenzofurancarboxylic Standards
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Recommended Standards
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- 2-Acetyl-1-pyrroline 13C5 in DCM (CAS 1449323-18-5)
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- Ethyl imidazo[1,5-a]pyridine-7-carboxylate hydrochloride (CAS 1914148-56-3)
- 2-Bromo-4,6-dimethylpyridin-3-ol (CAS 1062541-68-7)
- 4-(4-Methoxyphenyl)-1h-pyrrole-2-carboxylic acid (CAS 1204297-39-1)
- 4-Chloroquinoline-7-carbaldehyde (CAS 1785002-28-9)
- Semaglutide impurity 251 (CAS CATO-C4X-2226251)
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