Methyl 4-nitro-1H-pyrazole-3-carboxylate hydrochloride CAS 1166981-47-0
| CAS No. | 1166981-47-0 |
| Molecular Formula | C5H5N3O4 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Methyl 4-nitro-1H-pyrazole-3-carboxylate hydrochloride (CAS 1166981-47-0) is a high-purity analytical reference standard with the molecular formula C5H5N3O4HCl and a molecular weight of 207.57 g/mol.
The molecular framework of Methyl 4-nitro-1H-pyrazole-3-carboxylate hydrochloride (C5H5N3O4HCl) is characterized by a carbohydrate-derived structure, an amide group, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C5H5N3O4 HCl |
| Molecular Weight | 207.57 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 methanol, ethanol, DMSO, water |
| 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.) | 1989 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
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- 5-(3-(3-Hydroxyphenoxy)azetidin-1-yl)-5-methyl-2,2-diphenylhexanamide (CAS 931409-24-4)
- Tau Peptide (277-291) trifluoroacetate salt (CAS 330456-40-1)
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