Tetracycline EP Impurity B CAS 6542-44-5
| CAS No. | 6542-44-5 |
| Molecular Formula | C23H25NO8 |
| Molecular Weight | 443.45 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 Tetracycline EP Impurity B.
Tetracycline EP Impurity B (CAS 6542-44-5) is a certified pharmaceutical impurity reference standard with the molecular formula C23H25NO8 and a molecular weight of 443.45 g/mol.
Structurally, Tetracycline EP Impurity B (C23H25NO8) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 443.45 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.
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 Tetracycline EP Impurity B 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 | C23H25NO8 |
| Molecular Weight | 443.45 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related Tetracycline Standards
- Tetracycline EP Impurity A (CAS 79-85-6)
- Tetracycline Impurity 8 (CAS CATO-C4X-23318)
- Tetracycline-d6 (CAS CATO-CCHM702732)
- Tetracycline-d6 (CAS 2373374-42-4)
- Tetracycline Impurity 9 (CAS CATO-C4X-23319)
- Tetracycline impurity 5 (CAS CATO-C4X-23315)
- Tetracycline EP Impurity C (CAS 1665-56-1)
- Tetracycline EP Impurity D (CAS 7518-17-4)
Recommended Standards
- Doxycycline EP Impurity F (CAS 122861-53-4)
- T 3364366 (CAS 1356354-09-0)
- Doxycycline Impurity 21 (CAS CATO-C4X-193121)
- 2,6-Dimethyl-3,5-Diethoxycarbonyl-4-(O-Difluoromethylsulfonylphenyl)-1,4-Dihydropyridine (CAS 84761-75-1)
- Lemborexant Impurity 55 (CAS CATO-C4X-304255)
- Febuxostat Impurity 18 (CAS 1312815-35-2)
- Itraconazole Methoxy IsopropyIrtiazolone Impurity (CAS CATO-C4X-14979)
- N1-((6-Chloropyridazin-3-yl)methyl)-N1-cyclopropylethane-1,2-diamine (CAS 1353960-26-5)
- 9-(3-Chlorophenyl)-2,4-bis(trifluoromethyl)-[1,2,4]triazolo[4,3-a]1,8-naphthyridine (CAS 338962-26-8)
- Z-D-Glu-OBzl (CAS 65706-99-2)
- 6-((3,4-Dihydroisoquinolin-2(1H)-yl)sulfonyl)-[1,2,4]triazolo[4,3-a]pyridin-3-ol (CAS 1291859-10-3)
- 1-(3-((3-Chlorofuro[2,3-b]quinolin-4-yl)amino)phenyl)ethanone (CAS 629164-69-8)
- 2-Bromo-4-iodo-6-(trifluoromethyl)aniline (CAS 952901-54-1)
- Tirzepatide Impurity 44 (CAS CATO-C4X-324044)
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