rac-Clemastine Fumarate EP Impurity B CAS 61771-18-4
Purity 97%+In StockPharmacopoeial Impurity Standards
| CAS No. | 61771-18-4 |
| Molecular Formula | C21H26ClNO |
| Molecular Weight | 343.89 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
rac-Clemastine Fumarate EP Impurity B (CAS 61771-18-4) is a pharmacopoeial impurity standards certified reference material from CATO. Molecular formula: C21H26ClNO. Molecular weight: 343.89 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.
Physical & Chemical Properties
| Molecular Formula | C21H26ClNO |
| Molecular Weight | 343.89 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1974 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related rac Standards
- Clemastine Impurity 15 (CAS CATO-C4X-183715)
- Clemastine Impurity 16 (CAS CATO-C4X-183716)
- Clemastine EP Impurity B (CAS 1352549-49-5)
- Clemastine Impurity 21 (CAS CATO-C4X-183721)
- Clemastine Impurity 22 (CAS CATO-C4X-183722)
- Clemastine (CAS 15686-51-8)
- Clemastine Impurity 33 (CAS CATO-C4X-183733)
- Clemastine Impurity 32 (CAS CATO-C4X-183732)
Recommended Standards
- 5-(4-Butylphenyl)-6-chloro-N-cyclopentyl-2-methylpyrimidin-4-amine (CAS 917895-67-1)
- Sertraline Impurity 60 (CAS CATO-C4X-134460)
- 4,5-Diiodo-1H-pyrrole-2-carbonitrile (CAS 51148-01-7)
- Alprazolam Impurity 20 (CAS 26381-66-8)
- Brexpiprazole Impurity 172 (CAS CATO-C4X-1131172)
- 1-[(3-Fluorophenyl)methyl]-4-nitro-1h-pyrazole (CAS 1007477-02-2)
- 2-Chloro-3-[(4-N,N-dimethylamino)phenyl]-1-propene (CAS 951889-72-8)
- 6-(4-Fluorophenyl)-3-(methylsulfinyl)-1,2,4-triazine (CAS 1380345-95-8)
- tert-Butyl (thiazolidin-2-ylmethyl)carbamate (CAS 720000-21-5)
- Tirzepatide Impurity 18 (CAS CATO-C4X-324018)
Why CATO?
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