4-Chloro-3-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid CAS 88-76-6
| CAS No. | 88-76-6 |
| Molecular Formula | C10H9ClN2O4S |
| Molecular Weight | 288.71 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-Chloro-3-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid 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.
CATO supplies 4-Chloro-3-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid (CAS 88-76-6), a certified reference material (molecular formula C10H9ClN2O4S, MW 288.71 g/mol) for analytical method development and quality control.
Structurally, 4-Chloro-3-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid (C10H9ClN2O4S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 288.71 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C10H9ClN2O4S |
| Molecular Weight | 288.71 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 |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- Methyl ((5-chloro-2-cyanophenyl)sulfonyl)glycinate (CAS 1154278-39-3)
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Recommended Standards
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- 1,3-Dimethyl-2,4-dioxo-1,2,3,4-tetrahydroquinazoline-6-sulfonyl chloride (CAS 773877-44-4)
- Cyclophosphamide impurity 30 (CAS 2924754-60-7)
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- (S)-Benzyl methyl(4-methyl-1-(pyrrolidin-1-yl)pentan-2-yl)carbamate (CAS 675602-77-4)
- Amfetamine sulfate CRS - * narc (CAS 60-13-9)
- tert-Butyl 3-chloro-1H-pyrazolo[3,4-b]pyridine-1-carboxylate (CAS 1822844-10-9)
- 3,5-Dimethylpyrazolo[1,5-a]pyrimidin-7(4H)-one (CAS 244127-32-0)
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- 1-(5-Cyclopropyl-1,3,4-oxadiazol-2-yl)ethan-1-amine (CAS 1017200-66-6)
- (D-Trp32)-Neuropeptide Y (porcine) trifluoroacetate salt (CAS 153549-78-1)
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