Levamisole EP Impurity D CAS 4335-28-8
| CAS No. | 4335-28-8 |
| Molecular Formula | C11H10N2S |
| Molecular Weight | 202.28 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality, Levamisole EP Impurity D is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 202.28 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Levamisole EP Impurity D (CAS 4335-28-8) is a certified pharmaceutical impurity reference standard with the molecular formula C11H10N2S and a molecular weight of 202.28 g/mol.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
CATO manufactures Levamisole EP Impurity D under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C11H10N2S |
| Molecular Weight | 202.28 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Levamisole Standards
- Levamisole Impurity B (CAS 20406-02-4)
- Levamisole EP Impurity B (CAS 37430-07-2)
- Levamisole (CAS 14769-73-4)
- Levamisole 4-Hydroxy Impurity (CAS 69359-04-2)
- Levamisole EP Impurity A (CAS 32190-34-4)
- Levamisole 4-Nitro Impurity (CAS 76497-81-9)
- Levamisole Phosphate (CAS 32093-35-9)
- Levamisole EP Impurity C (CAS 32190-33-3)
Recommended Standards
- 2,2'-Difluorobiphenyl (PFB 4) 2000 microg/mL in Methyl-tert-butyl ether 1-fluoro-2-(2-fluorophenyl)benzene 2,2'-Difluorobiphenyl 388-82-9 (CAS 388-82-9)
- Antu (CAS 86-88-4)
- 27955-44-8 4-Methyl-6-phenyl-pyrimidine-2-thiol 4-methyl-6-phenylpyrimidine-2-thiol (CAS 27955-44-8)
- Methyl 4-Hydroxydecanoate (CAS 102036-22-6)
- Posaconazole impurity 233 (CAS CATO-C4X-1208233)
- Bendamustine impurity 42 (CAS CATO-C4X-127142)
- Propofol EP Impurity F (CAS 618-45-1)
- 1XYE04C550 286-20-4 Cyclohexene oxide 1,2-Epoxycyclohexane 7-Oxabicyclo(4.1.0)heptane AI3-22170 CCHO CCRIS 1227 Cyclohexane, 1,2-epoxy- Cyclohexane oxide Cyclohexene epoxide Cyclohexene 1-oxide 1,2-Cyclohexene oxide Cyclohexene-1-oxide Cyclohexylene oxide EINECS 206-007-7 HSDB 5422 NSC 128074 Tetramethyleneoxirane UNII-1XYE04C550 EC 206-007-7 (CAS 286-20-4)
- (S)-tert-Butyl (1-(1H-imidazol-2-yl)-2-methylpropyl)carbamate (CAS 172729-99-6)
- 3-(1-Benzyl-4-hydroxypiperidin-4-yl)-2-chloroquinoline (CAS 783368-13-8)
- TRAP-5 amide (CAS 141923-41-3)
- 1-(1,1-Dimethylethyl) 2-ethyl 6-bromo-1H-indole-1,2-dicarboxylate (CAS 939045-17-7)
- n-(2,3-Dimethoxybenzyl)cyclopropanamine (CAS 892577-98-9)
- D-[His]1-Semaglutide (CAS CATO-C4X-222652)
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