Entacapone impurity 18 CAS CATO-C4X-162918
| CAS No. | CATO-C4X-162918 |
| Molecular Formula | C11H8N2O6 |
| Molecular Weight | 264.19 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Entacapone impurity 18 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.
As a process- or degradation-related impurity, Entacapone impurity 18 (CAS CATO-C4X-162918, C11H8N2O6) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Entacapone impurity 18 (C11H8N2O6) contains an amino-acid-derived structure, an amide group, 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 264.19 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C11H8N2O6 |
| Molecular Weight | 264.19 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related Entacapone Standards
- Entacapone EP Impurity G (CAS 1364322-41-7)
- Entacapone Impurity 1 (CAS CATO-C4X-16291)
- Entacapone impurity 52 (CAS CATO-C4X-162952)
- Entacapone Impurity 72 (CAS 893419-47-1)
- Entacapone Impurity 2 (CAS 150995-46-3)
- Entacapone EP Impurity F (CAS 160391-70-8)
- Entacapone Impurity 59 (CAS CATO-C4X-162959)
- Entacapone Impurity 01 (CAS 116314-52-4)
Recommended Standards
- Picrolonic acid (CAS 550-74-3)
- Furagin (CAS 1672-88-4)
- N-(5-(2-(5-Nitrofuran-2-yl)vinyl)-1,3,4-oxadiazol-2-yl)acetamide (CAS 24167-19-9)
- 6-[2-(trifluoromethyl)phenoxy]pyridine-3-carbonitrile (CAS 1016747-55-9)
- Desulfo Aztreonam Impurity 22 (CAS CATO-C4X-152222)
- Azacitidine Impurity 59 (CAS 89618-11-1)
- Baloxavir Marboxil Impurity 227 (CAS CATO-C4X-2108227)
- n-Cyclobutyl-2-methylcyclohexan-1-amine (CAS 1251358-57-2)
- N-Ethyl-2-oxooxazolidine-3-carboxamide (CAS 55474-60-7)
- (1R,4r)-4-(trifluoromethoxy)cyclohexan-1-amine (CAS 1403865-70-2)
- 1S-cis-Decamethrinic Acid (CAS 72691-18-0)
- Ethyl 2-{[(2-cyano-4,5-dimethoxyphenyl)carbamothioyl]amino}acetate (CAS 478039-60-0)
- Methyl 5-(hex-1-yn-1-yl)furan-2-carboxylate (CAS 175203-88-0)
- [pGlu] Semaglutide (CAS CATO-C4X-2226288)
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