Rifaximin EP Impurity D CAS CATO-C4X-15054
| CAS No. | CATO-C4X-15054 |
| Molecular Formula | C43H49N3O12 |
| Molecular Weight | 799.86 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Rifaximin EP Impurity D (CAS CATO-C4X-15054), a pharmacopoeial impurity reference standard (molecular formula C43H49N3O12, MW 799.86 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Rifaximin EP Impurity D is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 799.86 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
CATO manufactures Rifaximin EP Impurity D under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C43H49N3O12 |
| Molecular Weight | 799.86 g/mol |
| Purity | >90% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 21.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
Related Rifaximin Standards
- Rifaximin EP Impurity H (CAS 1210022-90-4)
- Rifaximin-d6(Major) (CAS 1262992-43-7)
- Rifaximin (CAS 80621-81-4)
- Rifaximin Impurity 12 (CAS CATO-C4X-150512)
- Rifaximin Impurity B (CAS 1351775-03-5)
- Rifaximin EP Impurity G (CAS 80621-76-7)
- Rifaximin-N-Oxide (CAS 51963-55-4)
- Rifaximin EP Impurity B (CAS 13929-35-6)
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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