Indocyanine Green Impurity 42 CAS 1182721-75-0
| CAS No. | 1182721-75-0 |
| Molecular Formula | C30H32N2O3S |
| Molecular Weight | 500.65 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Indocyanine Green Impurity 42 (C30H32N2O3S) contains a steroid core, an amide group, a sulfone 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a process- or degradation-related impurity, Indocyanine Green Impurity 42 (CAS 1182721-75-0, C30H32N2O3S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
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 | C30H32N2O3S |
| Molecular Weight | 500.65 g/mol |
| 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Indocyanine Standards
- Indocyanine Green Impurity 16 (CAS CATO-C4X-250316)
- Indocyanine Green Impurity 64 (CAS 1351043-94-1)
- Indocyanine Green Impurity 8 (CAS 63450-66-8)
- Indocyanine green Impurity 55 (CAS CATO-C4X-250355)
- Indocyanine Green Impurity 43 (CAS CATO-C4X-250343)
- Indocyanine Green Impurity 52 (CAS CATO-C4X-250352)
- Indocyanine Green Impurity 63 (CAS CATO-C4X-250363)
- Indocyanine green Impurity 57 (CAS CATO-C4X-250357)
Recommended Standards
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