Niclosamide Impurity 3 CAS 4638-49-7
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 4638-49-7 |
| Molecular Formula | C13H9ClN2O4 |
| Molecular Weight | 292.67 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Niclosamide Impurity 3 (CAS 4638-49-7) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C13H9ClN2O4. Molecular weight: 292.67 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C13H9ClN2O4 |
| Molecular Weight | 292.67 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Niclosamide Standards
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- Niclosamide-13C6 (CAS 1325808-64-7)
- Niclosamide Impurity 4 (CAS 16739-21-2)
- Niclosamide Monohydrate (CAS 73360-56-2)
- Niclosamide Piperazine Salt (CAS 34892-17-6)
Recommended Standards
- Olanzapine Impurity 21 (CAS 60091-87-4)
- 398486-54-9 diethyl (Z)-(2-(4-chlorophenyl)-1-fluorovinyl)phosphonate (CAS 398486-54-9)
- 1-((3-Chloro-5-(trifluoromethyl)pyridin-2-yl)methyl)piperidin-4-one (CAS 1057282-45-7)
- Nikethamide Impurity 14 (CAS 77727-88-9)
- Gemcitabine Impurity 28 (CAS 134790-40-2)
- 5-Ethynylpicolinamide (CAS 1314640-56-6)
- 2-Bromo-N-(furan-3-ylmethyl)-N-(2-(thiophen-2-yl)ethyl)benzenesulfonamide (CAS 1797246-37-7)
- 3-(4-Methoxyphenyl)-1-(4-(trifluoromethyl)phenyl)propan-1-one (CAS 898776-07-3)
- 1-Benzyl-N-(2-nitrobenzyl)piperidin-4-amine (CAS 98754-28-0)
- Tirzepatide Impurity 47 (CAS CATO-C4X-324047)
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