Indapamide Impurity 23 CAS CATO-C4X-140023
| CAS No. | CATO-C4X-140023 |
| Molecular Formula | C16H16ClN3O4S |
| Molecular Weight | 381.83 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Indapamide Impurity 23 (CAS CATO-C4X-140023), a pharmacopoeial impurity reference standard (molecular formula C16H16ClN3O4S, MW 381.83 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Indapamide Impurity 23 (C16H16ClN3O4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 381.83 g/mol, it falls into the moderately-high-molecular-weight range. 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).
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 manufactures Indapamide Impurity 23 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 | C16H16ClN3O4S |
| Molecular Weight | 381.83 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Indapamide Standards
- Indapamide Impurity 8 (CAS 126750-70-7)
- Indapamide Impurity 24 (CAS CATO-C4X-140024)
- Indapamide Impurity 50 (CAS CATO-C4X-140050)
- Indapamide Impurity 27 (CAS CATO-C4X-140027)
- Indapamide Impurity 28 (CAS CATO-C4X-140028)
- Indapamide Impurity 30 (CAS 77083-53-5)
- Indapamide Impurity 31 (CAS 77083-52-4)
- Indapamide (CAS 26807-65-8)
Recommended Standards
- Ethyl 4-(2-((4-chlorophenyl)sulfonyl)acetamido)benzoate (CAS 895467-50-2)
- 5-(4-Acetylbenzamido)-2-ethoxybenzene-1-sulfonyl chloride (CAS 680618-04-6)
- Chlortalidone EP Impurity I (CAS 2514668-27-8)
- 3-Chloro-4-(3-(4-methoxyphenyl)-5-oxoimidazolidin-1-yl)benzenesulfonamide (CAS 53298-06-9)
- Fingolimod Impurity 28 (CAS 162358-07-8)
- Pinaverium impurity 29 (CAS 2704346-81-4)
- Ibrutinib Impurity 62 (CAS CATO-C4X-106462)
- 2-amino-N-(4-iodophenyl)acetamide hydrochloride (CAS 855482-29-0)
- CAS 2206360-84-9 (CAS 2206360-84-9)
- Ethyl 2-(6-Amino-2,3-dichlorobenzyl)glycine DiHCl(Anagrelide Impurity A) (CAS 882301-57-7)
- 6-Hydroxyquinoline-4-carbaldehyde (CAS 1261490-63-4)
- 6-Pyridazin-3-ylmethyl-[1,4]oxazepane hydrochloride (CAS 1361112-41-5)
- 4-Isoxazol-5-yl-4-methylpiperidine hydrochloride (CAS 2108139-04-2)
- Semaglutide impurity 01 (CAS 1998701-31-7)
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