Indocyanine Green Impurity 28 CAS 906772-02-9
| CAS No. | 906772-02-9 |
| Molecular Formula | C18H21NO4S |
| Molecular Weight | 347.43 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Indocyanine Green Impurity 28 (CAS 906772-02-9), a pharmacopoeial impurity reference standard (molecular formula C18H21NO4S, MW 347.43 g/mol) used for the identification and quantification of trace impurities in APIs.
Indocyanine Green Impurity 28 (C18H21NO4S) contains a flavonoid core, an amide group, a sulfone group, 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. 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 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.
As a certified reference material (CRM), Indocyanine Green Impurity 28 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 | C18H21NO4S |
| Molecular Weight | 347.43 g/mol |
| Purity | >95% |
| 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 |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Indocyanine Standards
- Indocyanine Green Impurity 31 (CAS 2776202-53-8)
- Indocyanine Green Impurity 6 (CAS CATO-C4X-25036)
- Indocyanine Green Impurity 67 (CAS CATO-C4X-250367)
- Indocyanine Green Impurity 61 (CAS CATO-C4X-250361)
- Indocyanine Green Impurity 51 (CAS CATO-C4X-250351)
- Indocyanine Green Impurity 17 (CAS CATO-C4X-250317)
- Indocyanine green Impurity 57 (CAS CATO-C4X-250357)
- Indocyanine Green Impurity 43 (CAS CATO-C4X-250343)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com