4-Iodo-3-methyl-1h-pyrazole-5-carboxylic acid CAS 861553-53-9
| CAS No. | 861553-53-9 |
| Molecular Formula | C5H5IN2O2 |
| Molecular Weight | 252.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 252.01 g/mol gives 4-Iodo-3-methyl-1h-pyrazole-5-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Iodo-3-methyl-1h-pyrazole-5-carboxylic acid (CAS 861553-53-9), molecular formula C5H5IN2O2 and molecular weight 252.01 g/mol, is a CATO reference standard with documented purity and traceability.
4-Iodo-3-methyl-1h-pyrazole-5-carboxylic acid (C5H5IN2O2) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, iodine 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. 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), 4-Iodo-3-methyl-1h-pyrazole-5-carboxylic acid 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 | C5H5IN2O2 |
| Molecular Weight | 252.01 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 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 |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | I-containing |
| Nitrogen Atoms | 2 |
Related Iodo Standards
- 4-Iodo-1H-pyrazole-3-carbohydrazide (CAS 1005592-09-5)
- 5-Iodo-1-methylpyrazole-4-carboxylic Acid (CAS 1198113-11-9)
- Methyl 3-iodo-1H-pyrazole-4-carboxylate (CAS 1268684-41-8)
- Methyl 4-iodo-1H-pyrazole-3-carboxylate (CAS 136944-79-1)
- Methyl 4-iodo-1H-imidazole-5-carboxylate (CAS 1379328-34-3)
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- 2-Iodo-4-methyloxazole-5-carboxamide (CAS 1823921-57-8)
Recommended Standards
- 4-Iodo-1-methylpyrazole-5-carboxylic Acid (CAS 75092-30-7)
- 5-Bromo-2-(difluoromethoxy)nicotinaldehyde (CAS 2231674-75-0)
- 4-Iodo-1-methyl-1H-pyrazole-3-carboxylic Acid (CAS 6647-98-9)
- 5-Iodo-1H-pyrazole-3-carbohydrazide (CAS 2730886-85-6)
- 4-(5-(1-Chloro-2-methylpropan-2-yl)-1,2,4-oxadiazol-3-yl)aniline (CAS 1373233-51-2)
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