Entacapone Impurity 35 CAS CATO-C4X-162935
| CAS No. | CATO-C4X-162935 |
| Molecular Formula | C21H25N5O6 |
| Molecular Weight | 443.45 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 Entacapone Impurity 35.
CATO supplies Entacapone Impurity 35 (CAS CATO-C4X-162935), a pharmacopoeial impurity reference standard (molecular formula C21H25N5O6, MW 443.45 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, Entacapone Impurity 35 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 443.45 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 Entacapone Impurity 35 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 | C21H25N5O6 |
| Molecular Weight | 443.45 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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 |
| Nitrogen Atoms | 5 |
Related Entacapone Standards
- Entacapone impurity 54 (CAS CATO-C4X-162954)
- Entacapone Impurity 5（Mixture of chiral isomers） (CAS CATO-C4X-16295)
- Entacapone impurity 43 (CAS CATO-C4X-162943)
- Entacapone impurity 41 (CAS CATO-C4X-162941)
- Entacapone 3-b-D-glucuronide (CAS 158069-75-1)
- Entacapone impurity 46 (CAS CATO-C4X-162946)
- Entacapone impurity 47 (CAS 1402714-31-1)
- Entacapone impurity 49 (CAS CATO-C4X-162949)
Recommended Standards
- Cefpodoxime Proxetil Impurity 18 (CAS CATO-C4X-157918)
- Minocycline EP Impurity C (CAS 4708-96-7)
- Cefoxitin Impurity 14 (CAS CATO-C4X-157814)
- 9-Monodemethyl Minocycline (CAS 4769-39-5)
- Saxagliptin Impurity 24 (CAS 841302-24-7(free base))
- Atrasentan Impurity 73 (CAS 1058404-70-8)
- Crisaborole impurity 118 (CAS CATO-C4X-2021118)
- 4-Bromo-3H-indol-6-amine (CAS 1822743-67-8)
- 5,5',5''-(Benzene-1,3,5-triyl)tris(thiophene-2-carboxylic acid) (CAS 1442006-75-8)
- 2-(4-Methylpyrrolidin-2-yl)phenol (CAS 603068-32-2)
- 4-Amino-7-(difluoromethoxy)-1,2,3,4-tetrahydronaphthalen-1-one hydrochloride (CAS 1423034-05-2)
- 1,3-Bis(1-(7-nitroquinazolin-4-yl)piperidin-4-yl)propane (CAS 52791-15-8)
- Sodium MethylsiliconateDiscontinued, see S667085 (CAS 16589-43-8)
- Semaglutide impurity 89 (CAS CATO-C4X-222689)
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