5-Bromo-4-chloro-1-ethyl-1H-pyrazole-3-carboxylic acid CAS 956734-89-7
| CAS No. | 956734-89-7 |
| Molecular Formula | C6H6BrClN2O2 |
| Molecular Weight | 253.48 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
5-Bromo-4-chloro-1-ethyl-1H-pyrazole-3-carboxylic acid (CAS 956734-89-7), molecular formula C6H6BrClN2O2 and molecular weight 253.48 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 5-Bromo-4-chloro-1-ethyl-1H-pyrazole-3-carboxylic acid (C6H6BrClN2O2) is characterized by an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine/bromine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
CATO manufactures 5-Bromo-4-chloro-1-ethyl-1H-pyrazole-3-carboxylic acid 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 | C6H6BrClN2O2 |
| Molecular Weight | 253.48 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
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Recommended Standards
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- 2-Chloro-4-(1-pyrrolidinylcarbonyl)phenylboronic acid (CAS 1449131-93-4)
- N,N-Dimethyl-3-bromo-4-methylbenzenesulfonamide (CAS 850429-72-0)
- Citenamide (CAS 10423-37-7)
- (3S)-3,4-dihydro-1H-2-benzopyran-3-carboxylic acid (CAS 156468-91-6)
- 3-[6-(Trifluoromethyl)-[1,2]oxazolo[4,5-b]pyridin-3-yl]pyridine (CAS 339106-40-0)
- 7-bromopyrrolo[2,1-f][1,2,4]triazine-2-carbonitrile (CAS 2090675-40-2)
- Methyl 2-bromo-4-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)butanoate (CAS 35294-53-2)
- CYM 2503 (CAS 1308833-36-4)
- Tetradecanoic Acid (CAS 544-63-8)
- Fmoc-Tyr-Ala-OH (CAS 220886-40-8)
- Semaglutide impurity 32 (CAS CATO-C4X-222632)
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