Torasemide impurity 33 CAS CATO-C4X-183633
| CAS No. | CATO-C4X-183633 |
| Molecular Formula | C7H8ClNO3S |
| Molecular Weight | 221.66 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Torasemide impurity 33 (CAS CATO-C4X-183633), a pharmacopoeial impurity reference standard (molecular formula C7H8ClNO3S, MW 221.66 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C7H8ClNO3S, Torasemide impurity 33 contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 221.66 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
CATO manufactures Torasemide impurity 33 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 | C7H8ClNO3S |
| Molecular Weight | 221.66 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Torasemide Standards
- Torasemide impurity 37 (CAS CATO-C4X-183637)
- Torasemide Impurity 16 (CAS CATO-C4X-183616)
- Torasemide impurity 34 (CAS CATO-C4X-183634)
- Torasemide impurity 36 (CAS CATO-C4X-183636)
- Torasemide impurity 31 (CAS CATO-C4X-183631)
- Torasemide Impurity 47 (CAS 204499-30-9)
- Torasemide Impurity 29 (CAS CATO-C4X-183629)
- Torasemide Impurity 10 (CAS 110363-52-5)
Recommended Standards
- Hydrochlorothiazide Impurity 36 (CAS CATO-C4X-117736)
- Diazoxide Impurity 19 (CAS CATO-C4X-195219)
- Hydrochlorothiazide Impurity 35 (CAS CATO-C4X-117735)
- 4-Amino-2-chlorotoluene-5-sulfonic Acid (CAS 88-51-7)
- Citalopram EP Impurity M HBr (CAS CATO-C4X-110946)
- Imipenem Impurity 112 (CAS CATO-C4X-1662112)
- Lurasidone Impurity 66 (CAS 85026-47-7)
- 4-(5-Methoxy-4-methoxycarbonyl-2-trifluoromethyl-phenyl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester (CAS 1418273-44-5)
- n-Methyl-2-[2-(methylamino)ethoxy]acetamide hydrochloride (CAS 1354953-86-8)
- 3-(Naphthalen-2-yl)prop-2-en-1-amine (CAS 1356494-05-7)
- 1-bromo-3-(cyclobutylmethyl)benzene (CAS 1643457-38-8)
- 5-Chloroquinoline-8-sulfonamide (CAS 299439-20-6)
- 3-(Oxolan-3-yl)azetidine (CAS 1334148-09-2)
- Human glucagon CRS (CAS 9007-92-5)
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