Tetracycline EP Impurity C CAS 1665-56-1
| CAS No. | 1665-56-1 |
| Molecular Formula | C22H22N2O7 |
| Molecular Weight | 426.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Tetracycline EP Impurity C (CAS 1665-56-1, C22H22N2O7) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C22H22N2O7, Tetracycline EP Impurity C contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 426.42 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C22H22N2O7 |
| Molecular Weight | 426.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
Related Tetracycline Standards
- Tetracycline EP Impurity D (CAS 7518-17-4)
- Tetracycline Impurity 9 (CAS CATO-C4X-23319)
- Tetracycline Impurity 8 (CAS CATO-C4X-23318)
- Tetracycline EP Impurity B (CAS 6542-44-5)
- Tetracycline EP Impurity A (CAS 79-85-6)
- Tetracycline-d6 (CAS CATO-CCHM702732)
- Tetracycline-d6 (CAS 2373374-42-4)
- Tetracycline impurity 5 (CAS CATO-C4X-23315)
Recommended Standards
- Azilsartan Impurity 41 (CAS CATO-C4X-109641)
- 72458-85-6 3H-Bis(1)benzopyrano(3,4-b:6',5'-e)pyran-7(7aH)-one, 13,13a-dihydro-6,7a-dihydroxy-9,10-dimethoxy-3,3-dimethyl-, (7aR-cis)- DTXSID50222755 (CAS 72458-85-6)
- Larotrectinib Impurity 16 (CAS 2699151-02-3)
- Pigment Red 22 (CAS 6448-95-9)
- Palbociclib Impurity 173 (CAS CATO-C4X-1125173)
- Tirofiban Impurity 86 (CAS CATO-C4X-125486)
- Thioctic acid Impurity 97 (CAS CATO-C4X-152697)
- 2-Hydroxy-2’-nitroacetophenone (CAS 287944-23-4)
- 8-methoxy-2-propylquinolin-4-ol (CAS 1070879-91-2)
- 5-((2-Methyl-4-(4-methylphenyl)-1,3-thiazol-5-yl)methyl)-1,3,4-oxadiazol-2-amine (CAS 1018239-48-9)
- 2-Bromo-4,5-dihydroxybenzaldehyde (CAS 4815-99-0)
- 6-(Trifluoromethyl)benzo[d]thiazol-2(3H)-one (CAS 898748-27-1)
- (1,6-Dimethyl-1H-indazol-4-yl)boronic acid (CAS 1310405-32-3)
- Tetrapeptide-30/Tegopep (CAS 1036207-61-0)
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