Furosemide Impurity 48 Sodium Salt CAS 133989-65-8（free base）
| CAS No. | 133989-65-8（free base） |
| Molecular Formula | C12H11N2NaO6S |
| Molecular Weight | 334.28 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Furosemide Impurity 48 Sodium Salt (CAS 133989-65-8（free base）) is a certified pharmaceutical impurity reference standard with the molecular formula C12H11N2NaO6S and a molecular weight of 334.28 g/mol.
Based on its molecular formula C12H11N2NaO6S, Furosemide Impurity 48 Sodium Salt contains a nitrogen-containing heterocyclic scaffold, 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 334.28 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).
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.
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 | C12H11N2NaO6S |
| Molecular Weight | 334.28 g/mol |
| Purity | 97%+ |
| 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) | 8.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Furosemide Standards
- Furosemide Impurity 54 (CAS 33069-75-9)
- Furosemide EP Impurity F (CAS 4793-38-8)
- Furosemide-d5 (CAS 1189482-35-6)
- Furosemide Impurity 25 (CAS 2309462-39-1)
- Furosemide Impurity 47 (CAS CATO-C4X-140247)
- Furosemide Impurity 9 (CAS CATO-C4X-14029)
- Furosemide (CAS 54-31-9)
- Furosemide EP Impurity A (CAS 4818-59-1)
Recommended Standards
- N-Acetyl-9-azido-9-deoxyneuraminic Acid (CAS 76487-51-9)
- Diflufenzopyr (CAS 109293-97-2)
- Dimethyl 4,6-dioxo-5-phenyltetrahydro-2H-pyrrolo[3,4-d]isoxazole-3,3(3aH)-dicarboxylate (CAS 338408-97-2)
- 2-(1H-Pyrazol-3-yl)-5-{[3-(trifluoromethyl)benzyl]oxy}benzenol (CAS 1007029-93-7)
- Mabuterol Impurity 13 (CAS CATO-C4X-145413)
- Metaraminol Impurity 85 (CAS CATO-C4X-225285)
- Furosemide Impurity N5 (CAS 62971-57-7)
- 4'-(Tribromomethyl)-[1,1'-biphenyl]-2-carbonitrile (CAS 876063-64-8)
- Pamatolol (CAS 59110-35-9)
- Difelikefalin Impurity 30 Trifluoroacetic acid (CAS CATO-C4X-304130)
- 3-Bromo-5-methoxy-4-[(4-methylbenzyl)oxy]benzaldehyde (CAS 351066-31-4)
- N-(Isoquinolin-1-ylmethyl)cyclopropanamine (CAS 1194487-42-7)
- ((2R,3S,4R,5R)-3,4-Dihydroxy-5-(6-hydroxy-9H-purin-9-yl)tetrahydrofuran-2-yl)methyl methyl hydrogen phosphate (CAS 141673-59-8)
- Urotensin II-Related Peptide (human, mouse, rat) (CAS 342878-90-4)
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