Gadoxetate Impurity 7 CAS 158599-73-6
| CAS No. | 158599-73-6 |
| Molecular Formula | C23H33N3O11 |
| Molecular Weight | 527.52 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a process- or degradation-related impurity, Gadoxetate Impurity 7 (CAS 158599-73-6, C23H33N3O11) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Gadoxetate Impurity 7 (C23H33N3O11) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 527.52 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C23H33N3O11 |
| Molecular Weight | 527.52 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Nitrogen Atoms | 3 |
Related Gadoxetate Standards
- Gadoxetate Impurity 14 (CAS 158599-72-5)
- Gadoxetate Impurity 12 (CAS CATO-C4X-261812)
- Gadoxetate Impurity 15 (CAS CATO-C4X-261816)
- Gadoxetate Impurity 15 (CAS CATO-C4X-261815)
- Gadoxetate Impurity 13 (CAS CATO-C4X-261813)
- Gadoxetate Impurity 6 (CAS CATO-C4X-26186)
- Gadoxetate impurity 21 (CAS CATO-C4X-261821)
- Gadoxetate Impurity 26 (CAS CATO-C4X-261826)
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