5-Methyl-4-nitro-1H-pyrazole-3-carboxylic acid CAS 75103-81-0
| CAS No. | 75103-81-0 |
| Molecular Formula | C5H5N3O4 |
| Molecular Weight | 171.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
5-Methyl-4-nitro-1H-pyrazole-3-carboxylic acid (CAS 75103-81-0) is a high-purity analytical reference standard with the molecular formula C5H5N3O4 and a molecular weight of 171.11 g/mol.
5-Methyl-4-nitro-1H-pyrazole-3-carboxylic acid (C5H5N3O4) contains a carbohydrate-derived structure, an amide group. 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.
CATO manufactures 5-Methyl-4-nitro-1H-pyrazole-3-carboxylic acid 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 | C5H5N3O4 |
| Molecular Weight | 171.11 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.) | 1978 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- 1-Methyl-4-nitro-1H-imidazole-2-carboxylic acid (CAS 109012-24-0)
- 2-Methyl-5-nitro-1H-imidazole-4-carboxylic acid (CAS 116273-51-9)
- 1-Methyl-5-nitro-1h-pyrazole-3-carboxylic acid (CAS 1171709-53-7)
- 1-(5-Nitro-2H-tetrazol-2-yl)propan-2-one (CAS 131394-19-9)
- Methyl 4-nitro-1H-pyrazole-5-carboxylate (CAS 1345513-95-2)
- 2-(5-Nitro-1H-imidazol-1-yl)acetic acid (CAS 14766-55-3)
- 1-Methyl-3-nitro-1h-pyrazole-5-carboxylic acid (CAS 177409-39-1)
- Methyl 3-nitro-1H-pyrazole-4-carboxylate (CAS 1798715-16-8)
Recommended Standards
- 5-Methyl-4-nitro-1H-pyrazole-3-carboxylic acid (CAS 5334-38-3)
- 5-Methyl-4-nitrofuran-2-carboxylic acid (CAS 326867-81-6)
- 5-Hydroxyimino-1,3-dimethyl-1,3-diazinane-2,4,6-trione (CAS 5417-13-0)
- 5-Nitrofuran-2-carbohydrazide (CAS 5469-78-3)
- N-[4-chloro-3-(trifluoromethyl)phenyl]-3-oxobutanamide (CAS 392721-37-8)
- (3S,4AS,6aR,11aS,11bS)-methyl 3-hydroxy-10,11b-dimethyl-2,3,4,4a,5,6,6a,11,11a,11b-decahydro-1H-benzo[a]fluorene-9-carboxylate (CAS 16996-09-1)
- 2-Fluoro-5-(4-methoxycarbonylphenyl)benzoic acid (CAS 1261980-30-6)
- 2-(1-Cyclopentyl-1H-pyrazol-3-yl)acetic acid (CAS 1260659-07-1)
- (R)-Allyl 2-amino-4-(methylthio)butanoate 4-methylbenzenesulfonic acid (CAS 1956435-98-5)
- 4-[2-(carbamoylamino)ethyl]benzoic acid (CAS 1153787-68-8)
- N-[(1,1-Dimethylethoxy)carbonyl]-L-homoserine phenylmethyl ester (CAS 105183-60-6)
- Trilaciclib impurity 15 (CAS CATO-C4X-304415)
- tert-Butyl 4-(5-chloropyrimidin-2-yl)-2-methylpiperazine-1-carboxylate (CAS 1261232-44-3)
- Myristoyl Pentapeptide -4 acetate (CAS 959610-30-1(free base))
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