4,4'-(1,3,5,7-Tetraoxopyrrolo[3,4-f]isoindole-2,6(1H,3H,5H,7H)-diyl)dibenzoic acid CAS 4649-42-7
| CAS No. | 4649-42-7 |
| Molecular Formula | C24H12N2O8 |
| Molecular Weight | 456.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,4'-(1,3,5,7-Tetraoxopyrrolo[3,4-f]isoindole-2,6(1H,3H,5H,7H)-diyl)dibenzoic acid (CAS 4649-42-7), molecular formula C24H12N2O8 and molecular weight 456.36 g/mol, is a CATO reference standard with documented purity and traceability.
4,4'-(1,3,5,7-Tetraoxopyrrolo[3,4-f]isoindole-2,6(1H,3H,5H,7H)-diyl)dibenzoic acid (C24H12N2O8) contains a flavonoid core, 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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), 4,4'-(1,3,5,7-Tetraoxopyrrolo[3,4-f]isoindole-2,6(1H,3H,5H,7H)-diyl)dibenzoic 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 | C24H12N2O8 |
| Molecular Weight | 456.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 20.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
Related Tetraoxopyrrolo Standards
Recommended Standards
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