Clopamide EP Impurity C CAS 1205-30-7
| CAS No. | 1205-30-7 |
| Molecular Formula | C7H6ClNO4S |
| Molecular Weight | 235.64 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Clopamide EP Impurity C meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
As a process- or degradation-related impurity, Clopamide EP Impurity C (CAS 1205-30-7, C7H6ClNO4S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Clopamide EP Impurity C (C7H6ClNO4S) is characterized by an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C7H6ClNO4S |
| Molecular Weight | 235.64 g/mol |
| Purity | >95% |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Clopamide Standards
Recommended Standards
- 2163-97-5 Benzene, 4-chloro-1-(methylsulfonyl)-2-nitro- 4-Chloro-2-nitrophenylmethyl sulphone 4-Chloro-2-nitrophenyl methyl sulfone EINECS 218-496-4 (CAS 2163-97-5)
- (2-Nitrophenyl)methanesulfonyl Chloride (CAS 24974-75-2)
- Phenyl N-(chlorosulfonyl)carbamate (CAS 50881-36-2)
- (Z)-2-(2-Amino-5-chlorothiazol-4-yl)-2-(methoxyimino)acetic acid (CAS 71445-30-2)
- Palbociclib Impurity 25 (CAS 1016636-76-2)
- Lenvatinib Impurity 75 (CAS CATO-C4X-114075)
- Tiotropium impurity 48 (CAS CATO-C4X-176448)
- 1-(2-(3-Bromophenoxy)ethyl)-4-methylpiperazine (CAS 1308596-49-7)
- 4-Chloro-2,5-dimethylfuro[2,3-d]pyrimidine (CAS 1785546-45-3)
- Benzyl octyl adipate (CAS 3089-55-2)
- 3-(Dimethylamino)-1-(1-hydroxycyclohexyl)-1-propanone (CAS 103857-06-3)
- N-(2-Ethylhexyl)-2-hydroxybenzamide (CAS 81957-23-5)
- Ethyl 1-(4,4,6-trimethyl-5,6-dihydro-4H-1,3-oxazin-2-yl)cyclopropane-1-carboxylate (CAS 33329-69-0)
- Des-Trp25-Tirzepatide (CAS CATO-CPTD788948)
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