4,5-Dibromo-1H-pyrazole-3-carbaldehyde CAS 1934271-86-9
| CAS No. | 1934271-86-9 |
| Molecular Formula | C4H2Br2N2O |
| Molecular Weight | 253.88 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,5-Dibromo-1H-pyrazole-3-carbaldehyde (CAS 1934271-86-9) is a high-purity analytical reference standard with the molecular formula C4H2Br2N2O and a molecular weight of 253.88 g/mol.
Owing to an amide group, a hydroxyl group, an ether linkage, bromine substitution, 4,5-Dibromo-1H-pyrazole-3-carbaldehyde is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 253.88 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.
CATO manufactures 4,5-Dibromo-1H-pyrazole-3-carbaldehyde 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 | C4H2Br2N2O |
| Molecular Weight | 253.88 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 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 |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Dibromo Standards
- 4,5-Dibromo-1H-imidazole-2-carbaldehyde (CAS 106848-46-8)
- 3,5-Dibromo-1H-pyrazole-4-carbaldehyde (CAS 888484-99-9)
- 3,5-Dibromo-2H-pyran-2-one (CAS 19978-41-7)
- 3,5-Dibromo-2-pyrazinone (CAS 21943-15-7)
- 4,5-Dibromo-2-furaldehyde (CAS 2433-85-4)
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Recommended Standards
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- 3,4-Dibromofuran-2-carbaldehyde (CAS 32460-03-0)
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- N1-(4-Cyclopropyl-6-(trifluoromethyl)pyrimidin-2-yl)ethane-1,2-diamine (CAS 869950-19-6)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com