Duloxetine Impurity 44 Oxalate CAS 116817-28-8
| CAS No. | 116817-28-8 |
| Molecular Formula | C18H19NOS |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Duloxetine Impurity 44 Oxalate 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 Duloxetine Impurity 44 Oxalate (CAS 116817-28-8), a pharmacopoeial impurity reference standard (molecular formula C18H19NOSC2H2O4, MW 387.45 g/mol) used for the identification and quantification of trace impurities in APIs.
Duloxetine Impurity 44 Oxalate (C18H19NOSC2H2O4) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C18H19NOS C2H2O4 |
| Molecular Weight | 387.45 g/mol |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Duloxetine Standards
- Duloxetine EP Impurity E HCl (CAS 1033719-36-6)
- Duloxetine EP Impurity E (CAS 1033803-59-6)
- Duloxetine Impurity 55 (CAS 1045348-04-6)
- Duloxetine Impurity 9 (CAS 110-14-5)
- rac-Duloxetine EP Impurity F HCl (CAS 1104890-90-5)
- Duloxetine EP Impurity B (CAS 116539-55-0)
- Duloxetine Impurity (CAS 116539-57-2)
- Duloxetine (CAS 116539-59-4)
Recommended Standards
- Pitavastatin Impurity 111 (CAS CATO-C4X-1037111)
- Doxorubicin Impurity N1 (CAS 80996-23-2)
- Dabrafenib Impurity N1 (CAS 1195765-47-9)
- 2-(Aminomethyl)-3-bromo-4-(difluoromethyl)-5-fluoropyridine (CAS 1805395-70-3)
- 1-(3-Chlorophenyl)-4-(4-chlorophenyl)-3-methyl-1H-pyrazol-5-amine (CAS 321385-92-6)
- 2,8-Diamino-9-(thiophen-2-ylmethyl)-1H-purin-6(9H)-one (CAS 104162-90-5)
- 2-(2-Chlorobenzo[d]oxazol-6-yl)acetic acid (CAS 1546680-53-8)
- 6,7-Dihydro-5h-cyclopenta[b]pyridine-7-sulfonamide (CAS 1533247-53-8)
- [(2,6-Dichlorophenyl)methyl](prop-2-en-1-yl)amine hydrochloride (CAS 1158552-93-2)
- 103244-41-3 Insulin-like Growth Factor-II fragment 33-40 Ser-Arg-Val-Ser-Arg-Arg-Ser-Arg (CAS 103244-41-3)
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