5-Chloro-1-methyl-1H-pyrazole-3-carbonyl chloride CAS 1017590-29-2
| CAS No. | 1017590-29-2 |
| Molecular Formula | C5H4Cl2N2O |
| Molecular Weight | 179.00 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Chloro-1-methyl-1H-pyrazole-3-carbonyl chloride (CAS 1017590-29-2), molecular formula C5H4Cl2N2O and molecular weight 179.00 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C5H4Cl2N2O, 5-Chloro-1-methyl-1H-pyrazole-3-carbonyl chloride contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 179.00 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
CATO manufactures 5-Chloro-1-methyl-1H-pyrazole-3-carbonyl chloride 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 | C5H4Cl2N2O |
| Molecular Weight | 179.00 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.) | 1988 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- 4-Chloro-1-methyl-1H-pyrazole-3-carbonyl chloride (CAS 1048340-09-5)
- 5-Chloro-1-methylpyrazole-4-carbonyl chloride (CAS 110763-09-2)
- 2-Chloro-1-(5-chlorofuran-2-yl)ethan-1-one (CAS 1378816-17-1)
- 157142-50-2 4-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride DTXSID80663117 (CAS 157142-50-2)
- 3-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride (CAS 173841-83-3)
- 4-Chloro-5-methyl-1H-pyrazole-3-carbonyl chloride (CAS 1858240-03-5)
- 2-Chloro-1-(4-chloro-1H-pyrazol-1-yl)ethanone (CAS 514218-28-1)
- 4-Chloro-3-methyl-1H-pyrazole-1-carbonyl chloride (CAS 67514-72-1)
Recommended Standards
- 1,3-dichloro-2-(difluoromethoxy)propane (CAS 60630-00-4)
- Thieno[2,3-c]pyridin-2-ylboronic acid (CAS 1018954-04-5)
- (T-4)-Diaqua[ethanedioato(2-)-κO1,κO2]manganese (CAS 6556-16-7)
- 5,6-Dichloro-1-methylpyrimidin-4(1H)-one (CAS 101912-72-5)
- (S)-4-oxo-4-(1-phenylethylamino)butanoic acid (S)-N-(1-Phenylethyl)succinic acid monoamide 21752-34-1 (CAS 21752-34-1)
- 2-(R)-Dibenzylaminopropan-1-ol (CAS 60479-64-3)
- 2-(Tetrahydrofuran-3-yl)acetaldehyde (CAS 1072-94-2)
- Gefitinib Impurity 4 (CAS 2089650-13-3)
- 3-Amino-6-phenylpyridazine (CAS 14966-91-7)
- Tert-butyl 4-(aminomethyl)-4-(4-methoxybenzyl)piperidine-1-carboxylate (CAS 1774896-85-3)
- 2-(2-((5-Amino-1H-1,2,4-triazol-3-yl)thio)ethyl)isoindoline-1,3-dione (CAS 728901-60-8)
- Sodium 4-formylbenzene-1,3-disulfonate (CAS 33513-44-9)
- Methyl 5-azaspiro[2.4]Heptane-1-carboxylate hydrochloride (CAS 2306277-77-8)
- D-Tyr1-Tirzepatide (CAS CATO-CPTD788928)
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