5-Chloro-1-methylpyrazole-4-carboxylic Acid CAS 54367-66-7
| CAS No. | 54367-66-7 |
| Molecular Formula | C5H5ClN2O2 |
| Molecular Weight | 160.56 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 160.56 g/mol gives 5-Chloro-1-methylpyrazole-4-carboxylic Acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-Chloro-1-methylpyrazole-4-carboxylic Acid (CAS 54367-66-7) is a high-purity analytical reference standard with the molecular formula C5H5ClN2O2 and a molecular weight of 160.56 g/mol.
Based on its molecular formula C5H5ClN2O2, 5-Chloro-1-methylpyrazole-4-carboxylic Acid contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 160.56 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C5H5ClN2O2 |
| Molecular Weight | 160.56 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.) | 1972 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- 4-Chloro-1h-pyrazole-3-carbohydrazide (CAS 1005584-54-2)
- 5-Chloro-2-methyl-1H-imidazole-4-carboxylic acid (CAS 1093261-72-3)
- 5-chloro-3-methyl-1H-pyrazole-4-carboxylic acid (CAS 1093414-62-0)
- 4-Chloro-6-methoxypyridazin-3(2H)-one (CAS 113707-82-7)
- 5-Chloro-6-methoxypyridazin-3(2H)-one (CAS 113707-83-8)
- 5-Chloro-1-methyl-1H-pyrazole-3-carboxylic acid, 97% (CAS 1173246-76-8)
- Methyl 5-chloro-1H-imidazole-4-carboxylate (CAS 1192372-11-4)
- methyl 5-chloro-1H-imidazole-2-carboxylate (CAS 1211589-29-5)
Recommended Standards
- 5-Amino-3-methylisoxazole-4-carbonyl chloride (CAS 219938-18-8)
- 5-Chloro-3-methylpyrimidine-2,4(1H,3H)-dione (CAS 75928-41-5)
- 5-(Chloromethyl)pyrimidine-2,4(1H,3H)-dione (CAS 3590-48-5)
- 5-chloro-4-methylfuran-3-carboxylic acid (CAS 214041-22-2)
- Ethyl 4-bromo-6-methoxypicolinate (CAS 1807214-52-3)
- trans-1-Benzyl 3-methyl 4-(4-chlorophenyl)pyrrolidine-1,3-dicarboxylate (CAS 2140264-30-6)
- N-(4-bromo-2-methylphenyl)-2-((4-bromophenyl)thio)acetamide (CAS 329779-18-2)
- Pemafibrate Impurity 67 (CAS CATO-C4X-290367)
- Benzyl 4-iodobutanoate (CAS 118058-69-8)
- 7-Fluoro-1,2,3,4-tetrahydronaphthalen-1-ol (CAS 173996-18-4)
- Posaconazole Impurity 6 (CAS 149809-42-7)
- (2-(4-Chlorobenzyl)propane-1,3-diyl)diphosphonic acid (CAS 103486-14-2)
- 2-(2-Fluorophenyl)quinoline-4-carboxylic acid (CAS 1647-89-8)
- Semaglutide Impurity 129 (CAS 2490269-79-7)
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