Rifamycin Impurity 9 CAS CATO-C4X-20049
| CAS No. | CATO-C4X-20049 |
| Molecular Formula | C37H47NO13 |
| Molecular Weight | 713.77 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Rifamycin Impurity 9 (CAS CATO-C4X-20049, C37H47NO13) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Rifamycin Impurity 9 (C37H47NO13) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 713.77 g/mol, it falls into the 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.
As a certified reference material (CRM), Rifamycin Impurity 9 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 | C37H47NO13 |
| Molecular Weight | 713.77 g/mol |
| Purity | >90% |
| Storage | Store at room temperature, 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Rifamycin Standards
Recommended Standards
- Rifapentine impurity 25 (CAS CATO-C4X-195925)
- 5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-(2-methoxyethyl)-N-(2-methyl-1-oxopropyl)guanosine (CAS 251647-50-4)
- Rifapentine impurity 24 (CAS CATO-C4X-195924)
- C11 TopFluor<SUP>®</SUP> Ceramide (CAS 1246355-58-7)
- Somatostatin Impurity 9 (CAS CATO-C4X-23509)
- Bempedoic Acid Impurity 35 (CAS CATO-C4X-218935)
- Cefoxitin Impurity 53 (CAS CATO-C4X-157853)
- 5-chloro-1-(2-fluorophenyl)-3,6-dimethyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid (CAS 1011398-61-0)
- 4-Oxo-2-(tetrahydrofuran-2-yl)-4-((3-(trifluoromethyl)phenyl)amino)butanoic acid (CAS 330951-09-2)
- Ensifentrine impurity 45 (CAS 3088358-10-2)
- 3,4'-Bipyridine (CAS 4394-11-0)
- (S)-3-(3-chlorophenyl)pyrrolidine (CAS 1335494-47-7)
- n-[(5-acetylthiophen-2-yl)methyl]acetamide (CAS 32415-45-5)
- endo-Ser39-Tirzepatide (CAS CATO-CPTD788935)
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