Indocyanine Green Impurity 6 CAS CATO-C4X-25036
| CAS No. | CATO-C4X-25036 |
| 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 6 (CAS CATO-C4X-25036), 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 6 (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. 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).
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.
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 | 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 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Indocyanine Standards
- Indocyanine Green Impurity 28 (CAS 906772-02-9)
- Indocyanine Green Impurity 31 (CAS 2776202-53-8)
- 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)
Recommended Standards
- L-Valine-d8-N-FMOC (CAS 1007834-06-1)
- Efaproxiral-d6 (CAS 1246815-16-6)
- Fluvastatin Impurity 17 (CAS CATO-C4X-165117)
- 2-Bromo-6-chloro-3-methoxyphenylboronic acid pinacol ester (CAS 2121513-36-6)
- LCZ-696 Impurity 38 (CAS CATO-C4X-169638)
- Thiamine Impurity 36 (CAS 408352-65-8)
- Clomifene Impurity 19 (CAS CATO-C4X-151219)
- Morinidazole Impurity 18 (CAS CATO-C4X-219618)
- (S)-1-((S)-Morpholin-2-yl)ethan-1-ol (CAS 1315056-80-4)
- 2-[(4-Aminophenyl)thio]-N-(2,4-dimethylphenyl)-propanamide (CAS 899588-82-0)
- Ethyl 3-iodo-5-nitro-1H-indole-2-carboxylate (CAS 494854-46-5)
- Letermovir Isopropyl Ester (CAS 2872586-94-0（free base）)
- Ethanol, 2-butoxy-, sodium salt (CAS 52663-57-7)
- Semaglutide impurity 236 (CAS CATO-C4X-2226236)
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