(S)-ethyl 4-(1-(3-(3,5-dichlorophenyl)-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)ethyl)benzoate CAS 870823-08-8
| CAS No. | 870823-08-8 |
| Molecular Formula | C20H18Cl2N2O3 |
| Molecular Weight | 405.27 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), (S)-ethyl 4-(1-(3-(3,5-dichlorophenyl)-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)ethyl)benzoate 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.
(S)-ethyl 4-(1-(3-(3,5-dichlorophenyl)-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)ethyl)benzoate (CAS 870823-08-8), molecular formula C20H18Cl2N2O3 and molecular weight 405.27 g/mol, is a CATO reference standard with documented purity and traceability.
(S)-ethyl 4-(1-(3-(3,5-dichlorophenyl)-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)ethyl)benzoate (C20H18Cl2N2O3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C20H18Cl2N2O3 |
| Molecular Weight | 405.27 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Recommended Standards
- (E)-N-(4-iodophenyl)-3-(4-isobutylphenyl)acrylamide (CAS 329778-61-2)
- [(3Z)-1-[(2,4-Dichlorophenyl)methyl]-2-oxo-2,3-dihydro-1H-indol-3-ylidene]amino 2,2-dimethylpropanoate (CAS 303997-04-8)
- 2-((3-(4-Bromophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)thio)acetohydrazide (CAS 133764-46-2)
- [(3Z)-1-[(2,4-Dichlorophenyl)methyl]-2-oxo-2,3-dihydro-1H-indol-3-ylidene]amino pentanoate (CAS 303996-98-7)
- tert-Butyl(6-azidohexyl)carbamate (CAS 129392-87-6)
- 2-(4-(Tert-butoxycarbonyl)-1,4-diazepan-1-yl)-2-(pyridin-3-yl)acetic acid (CAS 885275-68-3)
- 4-Amino-4'-(benzyloxy)[1,1'-biphenyl]-3-carboxylic acid (CAS 893739-13-4)
- 3,5-Diiodo-D-thyronine (CAS 5563-89-3)
- 2-Bromo-1-methyl-4-((trifluoromethyl)sulfonyl)benzene (CAS 1133116-35-4)
- 1-(3-Chloro-5-fluoropyridin-4-yl)ethanone (CAS 1256834-96-4)
- 5-Chloro-6-fluoropyridin-2(1H)-one (CAS 1227596-11-3)
- 1-Bromo-4-(phenoxymethyl)benzene (CAS 20600-22-0)
- 2,3-Diaminobenzoic acid hydrochloride (CAS 1354428-17-3)
- Semaglutide impurity 01 (CAS 1998701-31-7)
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