3-Methoxy-4-nitro-1H-pyrazole CAS 400755-41-1
| CAS No. | 400755-41-1 |
| Molecular Formula | C4H5N3O3 |
| Molecular Weight | 143.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Methoxy-4-nitro-1H-pyrazole (C4H5N3O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
3-Methoxy-4-nitro-1H-pyrazole (CAS 400755-41-1) is a high-purity analytical reference standard with the molecular formula C4H5N3O3 and a molecular weight of 143.10 g/mol.
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), 3-Methoxy-4-nitro-1H-pyrazole 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 | C4H5N3O3 |
| Molecular Weight | 143.10 g/mol |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |
Related Methoxy Standards
- 2-Methoxy-4-nitro-1H-imidazole (CAS 13369-89-6)
- 4-Methoxy-3-nitro-1H-pyrazole (CAS 2306277-70-1)
- 5-Methoxy-4-nitro-1H-imidazole (CAS 68019-78-3)
- 6-methoxy-2,3,4,5-tetrahydro-1,2,4-triazine-3,5-dione (CAS 57857-37-1)
- 2-Methoxy-1-(1H-1,2,3-triazol-4-yl)ethan-1-ol (CAS 120829-16-5)
- (3-Methoxy-5-methyl-isoxazol-4-yl)-methanol (CAS 75989-21-8)
- 3-Methoxy-1,4-dimethyl-1H-1,2,4-triazol-5(4H)-one (CAS 385377-26-4)
- 3-Methoxy-1-methylpyrrolidine-2,5-dione (CAS 922528-52-7)
Recommended Standards
- 2-Nitro-1H-imidazole-4-carbaldehyde (CAS 89176-71-6)
- 3-Methoxyisoxazole-4-carboxylic acid (CAS 753486-89-4)
- 2-Methyl-5-oxo-4,5-dihydrooxazole-4-carboxylic acid (CAS 906728-33-4)
- 3-Methyl-4-nitroisoxazol-5-amine (CAS 41230-51-7)
- 2-(2,6-Dimethylphenyl)pyrrolidine (CAS 899365-72-1)
- 2-((2-Methylallyl)oxy)benzoic acid (CAS 119171-39-0)
- 6-Amino-2-(1,3-dioxoisoindolin-2-yl)hexanoic acid (CAS 66653-54-1)
- ethyl 2-amino-6-fluoro-1H-indole-3-carboxylate (CAS 365547-79-1)
- 1-(3-Bromophenyl)-1,3-dihydro-2H-imidazol-2-one (CAS 944709-54-0)
- Ethyl 2-(1-methylpiperidin-4-yl)pyrimidine-5-carboxylate (CAS 1447607-67-1)
- N-(3-Amino-4-chlorophenyl)-3-(isopentyloxy)-benzamide (CAS 1020055-98-4)
- 3-(1,3-Dioxoisoindolin-2-yl)propanamide (CAS 4443-33-8)
- 1-Bromo-3,4-dihydro-1H-2-benzopyran (CAS 50683-32-4)
- Palmitoyl hexapeptide-6 (CAS 891498-01-4)
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