Levomepromazine EP Impurity A CAS 1771-18-2
| CAS No. | 1771-18-2 |
| Molecular Formula | C13H11NOS |
| Molecular Weight | 229.30 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Levomepromazine EP Impurity A.
Levomepromazine EP Impurity A (CAS 1771-18-2) is a certified pharmaceutical impurity reference standard with the molecular formula C13H11NOS and a molecular weight of 229.30 g/mol.
Structurally, Levomepromazine EP Impurity A (C13H11NOS) contains a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 229.30 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 Levomepromazine EP Impurity A 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 | C13H11NOS |
| Molecular Weight | 229.30 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | 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.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Levomepromazine Standards
- (±)-Levomepromazine (CAS 851-68-3)
- Levomepromazine (CAS 60-99-1)
- rac-Levomepromazine EP Impurity B (rac-Levomepromazine S-Oxide) (CAS 1188265-45-3)
- Levomepromazine Maleate EP Impurity B (CAS 7606-29-3)
- Levomepromazine Hydrochloride (CAS 1236-99-3)
- Levomepromazine maleate CRS (CAS 7104-38-3)
- Levomepromazine Sulphone Hydrochloride (CAS 60119-90-6)
- Levomepromazine EP Impurity C HCl (CAS 61733-92-4)
Recommended Standards
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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