Furosemide Impurity 23 CAS CATO-C4X-140223
| CAS No. | CATO-C4X-140223 |
| Molecular Formula | C11H12Cl2O5S |
| Molecular Weight | 327.18 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 Furosemide Impurity 23 (CAS CATO-C4X-140223), a pharmacopoeial impurity reference standard (molecular formula C11H12Cl2O5S, MW 327.18 g/mol) used for the identification and quantification of trace impurities in APIs.
Furosemide Impurity 23 (C11H12Cl2O5S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C11H12Cl2O5S |
| Molecular Weight | 327.18 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Furosemide Standards
- Furosemide Amide Impurity (CAS 4793-47-9)
- Furosemide Impurity 60 (CAS 866764-34-3)
- Furosemide (CAS 54-31-9)
- Furosemide EP Impurity A (CAS 4818-59-1)
- Furosemide Impurity 55 (CAS CATO-C4X-140255)
- Furosemide Impurity N3 (CAS 22893-13-6)
- Furosemide Impurity 25 (CAS 2309462-39-1)
- Furosemide Impurity 47 (CAS CATO-C4X-140247)
Recommended Standards
- tert-Butyl 3-bromo-2-cyano-5,6-dihydroimidazo[1,2-a]pyrazine-7(8H)-carboxylate (CAS 2768385-71-1)
- Selexipag Impurity 50 (CAS CATO-C4X-196150)
- N'1-(2-chloro-6-fluorobenzyl)-N'1-phenyl-2-chloroethanohydrazide (CAS 219689-44-8)
- Perampanel Impurity 1 (CAS 381248-06-2)
- HISTIDINE Impurity 10 (CAS CATO-C4X-323910)
- Diclofenac Impurity 45 (CAS 24542-74-3)
- Netupitant Impurity 25 (CAS 1314651-44-9)
- (2-Amino-4,5-dimethylthiophen-3-yl)(phenyl)methanone (CAS 42024-93-1)
- Ethyl 2,3-dibromo-6-fluorobenzoate (CAS 1805122-86-4)
- 2,6-Bis(benzyloxy)pyridine (CAS 16727-46-1)
- Tert-butyl (1-amino-2-methylpropan-2-yl)carbamate hydrochloride (CAS 169954-68-1)
- Alfacalcidol-d7 (CAS 41294-56-8 (non-d))
- 5-(tert-Butyl)-2-cyclopropoxy-N-methylaniline (CAS 1243406-27-0)
- Semaglutide impurity 29 (CAS 110990-08-4)
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