Diethyl 5-(3-bromophenyl)-1-(m-tolyl)-1H-pyrazole-3,4-dicarboxylate CAS 96722-99-5
| CAS No. | 96722-99-5 |
| Molecular Formula | C22H21BrN2O4 |
| Molecular Weight | 457.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Diethyl 5-(3-bromophenyl)-1-(m-tolyl)-1H-pyrazole-3,4-dicarboxylate.
Diethyl 5-(3-bromophenyl)-1-(m-tolyl)-1H-pyrazole-3,4-dicarboxylate (CAS 96722-99-5) is a high-purity analytical reference standard with the molecular formula C22H21BrN2O4 and a molecular weight of 457.32 g/mol.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution, Diethyl 5-(3-bromophenyl)-1-(m-tolyl)-1H-pyrazole-3,4-dicarboxylate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 457.32 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), Diethyl 5-(3-bromophenyl)-1-(m-tolyl)-1H-pyrazole-3,4-dicarboxylate 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 | C22H21BrN2O4 |
| Molecular Weight | 457.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Diethyl Standards
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Recommended Standards
- 1-(tert-Butyl) 2-(4-methoxybenzyl) 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrole-1,2-dicarboxylate (CAS 2377607-06-0)
- Ethyl 5-(((4-chloro-N-(4-chlorophenyl)phenyl)sulfonamido)methyl)-4,5-dihydroisoxazole-3-carboxylate (CAS 306978-11-0)
- 4-Bromo-2,7-dibutylbenzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetraone (CAS 1638888-62-6)
- Ethyl 5-(3-(trifluoromethyl)phenoxy)-3-(3-(trifluoromethyl)phenyl)-1,2,4-triazine-6-carboxylate (CAS 338957-80-5)
- Boc-p-azido-Phe-OH (CAS 33173-55-6)
- [Hydroxy(phenyl)methylene]malononitrile (CAS 5515-36-6)
- 2-propyl-1,3-benzothiazole (CAS 17229-76-4)
- 1-(2-(((2-Hydroxyethyl)amino)methyl)piperidin-1-yl)ethanone (CAS 1353947-67-7)
- 1-(2,6-difluorophenyl)guanidine hydrochloride (CAS 112677-41-5)
- 1-Chloro-4-[(4-phenoxybutyl)sulfanyl]benzene (CAS 339010-91-2)
- 2,3-Dimethoxypyrazine (CAS 68468-30-4)
- 5-(Tert-butyl)-3-methyl-[1,2,4]triazolo[4,3-a]pyrimidine-7-carboxylic acid (CAS 890621-55-3)
- 1,2-Epoxyoctadecane (CAS 7390-81-0)
- Dendroaspis Natriuretic Peptide (CAS 255721-52-9)
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