5-Bromo-1H-pyrazole-4-carbonitrile CAS 1703808-52-9
| CAS No. | 1703808-52-9 |
| Molecular Formula | C4H2BrN3 |
| Molecular Weight | 171.98 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 5-Bromo-1H-pyrazole-4-carbonitrile.
5-Bromo-1H-pyrazole-4-carbonitrile (CAS 1703808-52-9) is a high-purity analytical reference standard with the molecular formula C4H2BrN3 and a molecular weight of 171.98 g/mol.
5-Bromo-1H-pyrazole-4-carbonitrile (C4H2BrN3) contains a nitrile group, bromine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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), 5-Bromo-1H-pyrazole-4-carbonitrile 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 | C4H2BrN3 |
| Molecular Weight | 171.98 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1994 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
Related Bromo Standards
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Recommended Standards
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- 2-Carboxythiophene-3-boronic acid (CAS 5503-74-2)
- 2-Naphthyl caprylate (CAS 10251-17-9)
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- 3-{2-[(2-Methyl-2-propenyl)oxy]ethyl}piperidinehydrochloride (CAS 1220018-21-2)
- 1-(5-Chloro-2-iodophenyl)-2,2,2-trifluoroethan-1-one (CAS 2352648-31-6)
- 1-(4-Aminobenzoyl)piperidin-4-one (CAS 885274-94-2)
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- [α-Glu](Side Chain)-Semaglutide (CAS CATO-C4X-2226159)
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