Cyproheptadine impurity 7 CAS 4331-45-7
| CAS No. | 4331-45-7 |
| Molecular Formula | C20H19N |
| Molecular Weight | N/A |
| 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.
Cyproheptadine impurity 7 (CAS 4331-45-7) is a certified pharmaceutical impurity reference standard with the molecular formula C20H19NHCl and a molecular weight of 309.84 g/mol.
Based on its molecular formula C20H19NHCl, Cyproheptadine impurity 7 contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 309.84 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).
As a certified reference material (CRM), Cyproheptadine impurity 7 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 | C20H19N HCl |
| Molecular Weight | 309.84 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Cyproheptadine Standards
- Cyproheptadine N-Oxide (CAS 100295-63-4)
- Cyproheptadine impurity 15 (CAS 101596-48-9)
- Cyproheptadine (CAS 129-03-3)
- Cyproheptadine N-Desmethyl (CAS 14051-46-8（free base）)
- Cyproheptadine impurity 11 (CAS 19431-71-1)
- Cyproheptadine Impurity 2 (CAS 2222-33-5)
- Cyproheptadine EP Impurity A (CAS 256-81-5)
- Cyproheptadine-d3 (CAS 2712455-05-3)
Recommended Standards
- Oxomemazine impurity 1 (CAS CATO-C4X-29531)
- Dapagliflozin Impurity 223 (CAS CATO-C4X-1138223)
- Vilanterol Impurity 81 (CAS CATO-C4X-193581)
- N-(4-(2-Hydroxyethoxy)cyclohexyl)acetamide (CAS 1353960-07-2)
- N-[2-(Isopentyloxy)benzyl]-4-methylaniline (CAS 1040688-96-7)
- 61626-05-9 1,2,4,5-Tetrazine, 3,6-dihydro- DTXSID40210641 (CAS 61626-05-9)
- 4-Amino-1-(pyrrolidin-1-yl)butan-1-one (CAS 244789-38-6)
- Verteporfin Impurity 8 (CAS CATO-C4X-35498)
- 2-Cyclopropyl-3-oxobutanenitrile (CAS 918907-28-5)
- Semaglutide impurity 200 (CAS CATO-C4X-2226200)
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