Carbocisteine Impurity 55 CAS CATO-C4X-201055
| CAS No. | CATO-C4X-201055 |
| Molecular Formula | C5H8N2O5S |
| Molecular Weight | 208.19 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Carbocisteine Impurity 55 is closely related to a carbohydrate-derived structure, an amide group, a sulfone group in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies Carbocisteine Impurity 55 (CAS CATO-C4X-201055), a pharmacopoeial impurity reference standard (molecular formula C5H8N2O5S, MW 208.19 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a carbohydrate-derived structure, an amide group, a sulfone group, Carbocisteine Impurity 55 is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 208.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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), Carbocisteine Impurity 55 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 | C5H8N2O5S |
| Molecular Weight | 208.19 g/mol |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Carbocisteine Standards
- Carbocisteine Impurity 11 (CAS 25515-73-5)
- Carbocisteine Impurity 17 (CAS 15253-37-9)
- Carbocisteine Impurity 44 (CAS CATO-C4X-201044)
- Carbocisteine Impurity 10 (CAS 1601460-92-7)
- Carbocisteine Impurity 2 (CAS 2820941-84-0)
- Carbocisteine Impurity 4(Mixture of diastereomers) (CAS 5439-87-2)
- Carbocisteine (R)-S-Oxide (CAS 61475-35-2)
- Carbocisteine (S)-S-Oxide (CAS 112246-66-9)
Recommended Standards
- Aztreonam impurity 69 (CAS CATO-C4X-152269)
- 6-Hydrazinyl-2-oxo-2,3,4,5-tetrahydropyrimidine-4-sulfonic acid (CAS 106775-36-4)
- Flumazenil EP Impurity D (CAS 78755-80-3)
- 1-methyl-3-trifluoromethanesulfinylbenzene (CAS 1178899-45-0)
- Omeprazole impurity 32 (CAS CATO-C4X-125532)
- Isavuconazole Impurity 86 (CAS 40805-50-3)
- Vortioxetine Impurity 146 TFA (CAS 1429908-33-7 (free base))
- Benzyl 1H-indole-4-carboxylate (CAS 84401-11-6)
- 2-Amino-8-(2,3,4-trihydroxybutyl)-1H-purin-6(9H)-one (CAS 120083-56-9)
- Methyl (R)-2-(4-Methylphenylsulfonamido)-2-phenylacetate (CAS 111047-53-1)
- 4-Oxo-4,5-dihydro-1H-imidazole-2-carboxylic acid (CAS 861293-24-5)
- 4-(4-Acetyl-2-methoxyphenoxy)butanoic acid (CAS 174884-22-1)
- DL-Alanine Methyl Ester Hydrochloride (CAS 13515-97-4)
- Liraglutide Impurity 13 TFA Salt (CAS CATO-C4X-199213)
Why CATO?
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