1-Methyl-4-nitro-1H-pyrazole CAS 3994-50-1
| CAS No. | 3994-50-1 |
| Molecular Formula | C4H5N3O2 |
| Molecular Weight | 127.10 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 1-Methyl-4-nitro-1H-pyrazole.
1-Methyl-4-nitro-1H-pyrazole (CAS 3994-50-1) is a high-purity analytical reference standard with the molecular formula C4H5N3O2 and a molecular weight of 127.10 g/mol.
1-Methyl-4-nitro-1H-pyrazole (C4H5N3O2) 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 1-Methyl-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 | C4H5N3O2 |
| Molecular Weight | 127.10 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- 5-Methyl-3-nitro-1H-pyrazole (CAS 1048925-02-5)
- 1-Methyl-2-nitro-1H-imidazole (CAS 1671-82-5)
- 1-methyl-3-nitro-pyrazole (CAS 54210-32-1)
- 1-Methyl-4-nitro-1H-pyrazole, radical ion(1-) (CAS 82208-47-7)
- 1-Methyl-5-nitro-1h-pyrazole (CAS 54210-33-2)
- 3-Methyl-5-nitro-1H-pyrazole (CAS 34334-96-8)
- 4-methyl-1-nitro-1H-pyrazole (CAS 38858-82-1)
- 5-Methyl-2-nitro-1H-imidazole (CAS 5213-35-4)
Recommended Standards
- 1-Methyl-1H-1,2,3-triazole-5-carboxylic Acid (CAS 716361-91-0)
- 1H-1,2,4-Triazole-3-carboxamide, 5-amino-5-amino-4H-1,2,4-triazole-3-carboxamide (CAS 60016-63-9)
- 2-(1h-1,2,3,4-Tetrazol-5-yl)acetamide (CAS 501356-99-6)
- 1H-1,2,4-Triazole-3-carbohydrazide (CAS 21732-98-9)
- 4-(imidazo[1,2-a]pyridin-7-yloxy)-2-methylaniline (CAS 2007916-00-7)
- 2-Chloro-N-(2-methoxyacetyl)acetamide (CAS 852840-60-9)
- 1,2-Dibromo-3-difluoromethoxy-5-fluorobenzene (CAS 1804515-14-7)
- 2-(3-(Hydroxymethyl)piperidin-1-yl)isonicotinonitrile (CAS 939986-86-4)
- Ethyl 2-(3-bromo-5-fluoro-4-nitrophenyl)acetate (CAS 1805031-84-8)
- N-(6-Aminohexyl)-2-((9-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-9H-purin-6-yl)amino)acetamide (CAS 88123-03-9)
- Methyl 3-(N-((1,3,5-trimethyl-1H-pyrazol-4-yl)methyl)sulfamoyl)thiophene-2-carboxylate (CAS 1172372-80-3)
- 2-Chloro-5-(chloromethyl)-3-(difluoromethyl)-4-methylpyridine (CAS 1806902-39-5)
- N-(Pyrrolidin-3-ylmethyl)pivalamide hydrochloride (CAS 1346602-39-8)
- Des-Tyr10-Tirzepatide (CAS CATO-CPTD788680)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com