Faropenem Impurity 81 CAS CATO-C4X-128981
| CAS No. | CATO-C4X-128981 |
| Molecular Formula | C14H21NO6S |
| Molecular Weight | 331.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Faropenem Impurity 81.
Faropenem Impurity 81 (CAS CATO-C4X-128981) is a certified pharmaceutical impurity reference standard with the molecular formula C14H21NO6S and a molecular weight of 331.38 g/mol.
Structurally, Faropenem Impurity 81 (C14H21NO6S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 331.38 g/mol, it falls into the moderately-high-molecular-weight range. 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.
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 | C14H21NO6S |
| Molecular Weight | 331.38 g/mol |
| Purity | ≥90% |
| 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Faropenem Standards
- Faropenem Impurity 37 (CAS CATO-C4X-128937)
- Faropenem Impurity 38 (CAS CATO-C4X-128938)
- Faropenem Impurity 71 (CAS CATO-C4X-128971)
- Faropenem Impurity 72 (CAS CATO-C4X-128972)
- Faropenem Impurity 10 (CAS 106559-80-2)
- Faropenem Impurity 90 (CAS CATO-C4X-128990)
- Faropenem Impurity 76 (CAS CATO-C4X-128976)
- Faropenem Impurity 62 (CAS CATO-C4X-128962)
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- 2-[2-(4-Methoxyphenoxy)acetyl]-N-phenyl-1-hydrazinecarbothioamide (CAS 107951-85-9)
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- 1-(4-(4-Amino-2-chlorophenyl)piperazin-1-yl)-2,2-dimethylpropan-1-one (CAS 878441-21-5)
- 4-(3-Bromophenyl)-1-methyl-1H-imidazol-5-amine (CAS 1250398-27-6)
- N-(4-Methoxyphenyl)-N-methyl-2-morpholinoquinazolin-4-amine (CAS 827030-46-6)
- 2-Bromo-4-[(butylamino)methyl]-6-methoxyphenol (CAS 1019565-95-7)
- 1-(4-Bromophenyl)pent-4-en-1-ol (CAS 346446-95-5)
- Peptide Impurity 27 (CAS 1350456-68-6)
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