Darunavir Impurity 37 CAS 159005-61-5
| CAS No. | 159005-61-5 |
| Molecular Formula | C28H35N3O5S |
| Molecular Weight | 525.66 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Darunavir Impurity 37 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.
CATO supplies Darunavir Impurity 37 (CAS 159005-61-5), a pharmacopoeial impurity reference standard (molecular formula C28H35N3O5S, MW 525.66 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C28H35N3O5S, Darunavir Impurity 37 contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 525.66 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C28H35N3O5S |
| Molecular Weight | 525.66 g/mol |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Darunavir Standards
Recommended Standards
- Ro 0437626 (CAS 134362-79-1)
- Ritonavir EP Impurity J (CAS 162849-95-8)
- 4-(5-(3,5-Dimethylisoxazol-4-yl)benzo[b]thiophen-2-yl)-5-methyl-N-(4-(2-(pyrrolidin-1-yl)ethoxy)phenyl)pyrimidin-2-amine (CAS 1138474-57-3)
- Ritonavir EP Impurity K (CAS 1010809-39-8)
- Dextromethorphan Impurity 30 (CAS 367520-36-3)
- Doxapram Impurity 17 (CAS CATO-C4X-197317)
- Furazolidone Impurity 11 (CAS CATO-C4X-290111)
- N-benzyl-2-(2-phenyl-1H-benzo[d]imidazol-1-yl)-2-(piperidin-4-yl)acetamide (CAS 1440753-53-6)
- Desmethylcarfentanil acid (CAS 186022-53-7)
- 4-(4-Ethoxyphenoxy)benzene-1-sulfonamide (CAS 1097096-19-9)
- (2,4-Dimethoxyphenyl)trimethylsilane (CAS 952341-04-7)
- CCT239065 (CAS 1163719-51-4)
- 3-Pyridinecarbothioic acid (CAS 51087-03-7)
- Hexapeptide-11 (CAS 161258-30-6)
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