Rifaximin EP Impurity B CAS 13929-35-6
Purity 95%In StockPharmacopoeial Impurity Standards
| CAS No. | 13929-35-6 |
| Molecular Formula | C39H49NO14 |
| Molecular Weight | 755.80 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Rifaximin EP Impurity B (CAS 13929-35-6), a pharmacopoeial impurity standards reference standard manufactured under ISO 17034 accreditation. Molecular formula: C39H49NO14. Molecular weight: 755.80 g/mol. Batch-specific COA and technical support are available on request.
Physical & Chemical Properties
| Molecular Formula | C39H49NO14 |
| Molecular Weight | 755.80 g/mol |
| Purity | 95% |
| 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1960 |
| Nitrogen Atoms | 1 |
Related Rifaximin Standards
- Rifaximin EP Impurity F (CAS 14487-05-9)
- Rifaximin impurity 11 (CAS 80621-88-1)
- Rifaximin Impurity B (CAS 1351775-03-5)
- Rifaximin EP Impurity G (CAS 80621-76-7)
- Rifaximin (CAS 80621-81-4)
- Rifaximin Impurity 12 (CAS CATO-C4X-150512)
- Rifaximin-d6(Major) (CAS 1262992-43-7)
- Rifaximin EP Impurity D (CAS CATO-C4X-15054)
Recommended Standards
- Rifapentine impurity 21 (CAS 26117-02-2)
- Ac-Thr-Val-Ser-Phe-Asn-Phe-OH (H-1956.0005) (CAS 150626-30-5)
- (S)-2-(1-Naphthyl)-8-diphenylphosphino-1-[(R)-3,5-dioxa-4-phospha-cyclohepta[2,1-a;3,4-a']dinaphthalen-4-yl]-1,2-dihydroquinoline toluene adduct (CAS 1242168-77-9)
- Lubiprostone Impurity 31 (CAS CATO-C4X-113631)
- Vazegepant Impurity 16 (CAS CATO-C4X-320016)
- 3-chloro-3-(2-fluoro-phenyl)-2-oxo-propionic acid methyl ester (CAS 1007875-06-0)
- 4,4-Dimethoxy-1-(thiophen-2-yl)butane-1,3-dione (CAS 1341946-92-6)
- 2-(3-(Difluoromethyl)phenoxy)ethan-1-amine (CAS 1897638-12-8)
- 7-(Trifluoromethyl)-1H-benzo[d]imidazol-5-amine (CAS 1804174-58-0)
- D-Ile27-Tirzepatide (CAS CATO-CPTD788907)
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 13829788188 / jacky.chen@cato-chem.com