Levamisole EP Impurity E CAS 32190-36-6
| CAS No. | 32190-36-6 |
| Molecular Formula | C22H26N4O2S2 |
| Molecular Weight | 442.60 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 442.60 g/mol gives Levamisole EP Impurity E distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Levamisole EP Impurity E (CAS 32190-36-6) is a certified pharmaceutical impurity reference standard with the molecular formula C22H26N4O2S2 and a molecular weight of 442.60 g/mol.
The molecular framework of Levamisole EP Impurity E (C22H26N4O2S2) is characterized by a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
As a certified reference material (CRM), Levamisole EP Impurity E 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 | C22H26N4O2S2 |
| Molecular Weight | 442.60 g/mol |
| Purity | >95% |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 2 |
Related Levamisole Standards
- Levamisole 4-Nitro Impurity (CAS 76497-81-9)
- Levamisole EP Impurity A (CAS 32190-34-4)
- Levamisole 4-Hydroxy Impurity (CAS 69359-04-2)
- Levamisole Impurity B (CAS 20406-02-4)
- Levamisole EP Impurity B (CAS 37430-07-2)
- Levamisole (CAS 14769-73-4)
- Levamisole EP Impurity D (CAS 4335-28-8)
- Levamisole Phosphate (CAS 32093-35-9)
Recommended Standards
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- 3-Amino-6-methylthieno[2,3-b]pyridine-2-carboxamide (CAS 59488-61-8)
- Sodium tetrachlorogold(III)ate dihydrate (CAS 13874-02-7)
- N-(2-Fluoro-5-hydroxyphenyl)-N-(2-fluorophenyl)cyclopropane-1,1-dicarboxamide (CAS 1956321-31-5)
- 2-(2-Chloro-6-fluorophenyl)cyclopropane-1-carboxylic acid (CAS 1157642-59-5)
- Semaglutide impurity 25 (CAS CATO-C4X-222625)
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