1-(4-Iodobenzenesulfonyl)-3,4-bis(4-methoxyphenyl)-1H-pyrazole CAS 956921-19-0
| CAS No. | 956921-19-0 |
| Molecular Formula | C23H19IN2O4S |
| Molecular Weight | 546.38 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 1-(4-Iodobenzenesulfonyl)-3,4-bis(4-methoxyphenyl)-1H-pyrazole (C23H19IN2O4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, iodine substitution. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 546.38 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).
1-(4-Iodobenzenesulfonyl)-3,4-bis(4-methoxyphenyl)-1H-pyrazole (CAS 956921-19-0), molecular formula C23H19IN2O4S and molecular weight 546.38 g/mol, is a CATO reference standard with documented purity and traceability.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), 1-(4-Iodobenzenesulfonyl)-3,4-bis(4-methoxyphenyl)-1H-pyrazole 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.
Physical & Chemical Properties
| Molecular Formula | C23H19IN2O4S |
| Molecular Weight | 546.38 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | I-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Iodobenzenesulfonyl Standards
- 5-(4-Iodobenzenesulfonyl)-8-(trifluoromethyl)-1H,2H,3H,3aH,4H,5H-pyrrolo[1,2-a]quinoxaline (CAS 861207-33-2)
- 5-(4-Iodobenzenesulfonyl)-2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-2-one (CAS 866138-25-2)
- 4-(4-Iodobenzenesulfonyl)-1-oxa-4-azaspiro[4.5]decane (CAS 861209-87-2)
- 1-(4-Iodobenzenesulfonyl)piperidin-4-amine (CAS 1154258-05-5)
- 4-Iodobenzenesulfonyl fluoride (CAS 4241-66-1)
Recommended Standards
- 1,1,1-TRis(4-trifluorovinyloxyphenyl)ethane (CAS 134130-24-8)
- TrigalacturonicAcid (CAS 6037-45-2)
- [1,1':3',1''-Terphenyl]-4,4''-dicarboxylicacid,5'-(4-carboxy-3,5-difluorophenyl)-3,3'',5,5''-tetrafluoro- (CAS 1660960-33-7)
- (2E)-3-[2-(2,4-Dichlorophenoxy)phenyl]-2-{4-[2-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl)ethyl]-1,3-thiazol-2-yl}prop-2-enenitrile (CAS 866019-87-6)
- 2-Chloro-1,1,1-Trifluoroethane (CAS 75-88-7)
- 3-Methyl-N'-(4-pentylcyclohexane-1-carbonyl)benzohydrazide (CAS 866039-74-9)
- 2,2,2-Trifluoroethyl N-(2-methyl-1,3-dioxo-2,3-dihydro-1H-isoindol-5-yl)carbamate (CAS 1087788-74-6)
- 1-Phenyl-1H-benzo[d][1,2,3]triazol-5-amine (CAS 54883-78-2)
- Methyl 2-amino-4-methoxy-3-methylbutanoate (CAS 1342399-53-4)
- 2-(1H-Tetrazol-1-yl)benzoic acid (CAS 116570-12-8)
- 4-Chloro-2-(pyridin-4-yl)pyrido[3,4-d]pyrimidine (CAS 1589081-42-4)
- 2-Amino-3-(6,6-dimethyl-2,4-dioxo-3-azabicyclo[3.1.0]hexan-3-yl)propanoic acid (CAS 1342984-67-1)
- 2-(Dimethylamino)-2-(p-tolyl)-acetonitrile hydrochloride (CAS 1440535-64-7)
- Des-Pro36-Tirzepatide (CAS CATO-CPTD788937)
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