Torasemide Impurity 43 CAS CATO-C4X-183643
| CAS No. | CATO-C4X-183643 |
| Molecular Formula | C16H19N5O4S |
| Molecular Weight | 377.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Torasemide Impurity 43 (CAS CATO-C4X-183643), a pharmacopoeial impurity reference standard (molecular formula C16H19N5O4S, MW 377.42 g/mol) used for the identification and quantification of trace impurities in APIs.
Torasemide Impurity 43 (C16H19N5O4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures Torasemide Impurity 43 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 | C16H19N5O4S |
| Molecular Weight | 377.42 g/mol |
| Purity | ≥95% |
| Storage | Store at 2-8°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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Torasemide Standards
- Torasemide Impurity 42 (CAS CATO-C4X-183642)
- Torasemide Impurity 46 (CAS CATO-C4X-183646)
- Torasemide Impurity 11 (CAS 113844-99-8)
- Torasemide Impurity 24 (CAS CATO-C4X-183624)
- Torasemide Impurity 13 (CAS CATO-C4X-183613)
- Torasemide Impurity 15 (CAS CATO-C4X-183615)
- Torasemide Impurity 12 (CAS 99300-68-2)
- Torasemide Impurity 28 (CAS 58154-83-9)
Recommended Standards
- Isavuconazole Impurity 67 (CAS CATO-C4X-123667)
- CH5132799 (CAS 1007207-67-1)
- tert-Butyl (Triphenylphosphoranylidene)carbamate (CAS 68014-21-1)
- Disperse Blue 124 (CAS 61951-51-7)
- Oteseconazole Impurity 3 (CAS CATO-C4X-33373)
- Albendazole EP Impurity L (CAS 108579-67-5)
- Galantamine Impurity 11 (CAS 21041-10-1)
- 4-Methylpentanamide (CAS 1119-29-5)
- 4-Bromo-4-(thiomethyl)benzophenone (CAS 197439-28-4)
- (R)-2-(4-(Difluoromethyl)phenyl)propanoic acid (CAS 1630543-20-2)
- Diethyl 2-(2-chloropyrimidin-4-yl)malonate (CAS 879403-14-2)
- 2-Chloro-N-ethyl-6-methylpyrimidin-4-amine (CAS 502141-81-3)
- N-(4-Methoxybenzyl)thiazol-2-amine (CAS 384858-14-4)
- Liraglutide Impurity 6 TFA Salt (CAS CATO-C4X-19926)
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