Methyl 1-hydroxy-3-nitro-1H-pyrazole-5-carboxylate CAS 181585-86-4
| CAS No. | 181585-86-4 |
| Molecular Formula | C5H5N3O5 |
| Molecular Weight | 187.11 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 Methyl 1-hydroxy-3-nitro-1H-pyrazole-5-carboxylate.
CATO supplies Methyl 1-hydroxy-3-nitro-1H-pyrazole-5-carboxylate (CAS 181585-86-4), a certified reference material (molecular formula C5H5N3O5, MW 187.11 g/mol) for analytical method development and quality control.
Structurally, Methyl 1-hydroxy-3-nitro-1H-pyrazole-5-carboxylate (C5H5N3O5) contains a carbohydrate-derived structure, an amide group. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 187.11 g/mol, it falls into the medium-molecular-weight range. 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.
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 | C5H5N3O5 |
| Molecular Weight | 187.11 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2008 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
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Recommended Standards
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