5-(4-Nitrophenyl)-1H-pyrazole-3-carboxylic acid CAS 189083-63-4
| CAS No. | 189083-63-4 |
| Molecular Formula | C10H7N3O4 |
| Molecular Weight | 233.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-(4-Nitrophenyl)-1H-pyrazole-3-carboxylic acid 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.
5-(4-Nitrophenyl)-1H-pyrazole-3-carboxylic acid (CAS 189083-63-4), molecular formula C10H7N3O4 and molecular weight 233.18 g/mol, is a CATO reference standard with documented purity and traceability.
5-(4-Nitrophenyl)-1H-pyrazole-3-carboxylic acid (C10H7N3O4) 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.
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.
Physical & Chemical Properties
| Molecular Formula | C10H7N3O4 |
| Molecular Weight | 233.18 g/mol |
| Appearance | Pale yellow to 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 |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2011 |
| Nitrogen Atoms | 3 |
Related Nitrophenyl Standards
- 1-(2-Nitrophenyl)-1h-pyrazole-3-carboxylic acid (CAS 1006442-69-8)
- 1-(2-Nitrophenyl)-1h-pyrazole-4-carboxylic acid (CAS 1006952-14-2)
- 1-(3-Nitrophenyl)-1h-pyrazole-3-carboxylic acid (CAS 1152836-50-4)
- 1-(2-Nitrophenyl)imidazole-4-carboxylic acid (CAS 1272840-24-0)
- 5-(3-Nitrophenyl)furan-2-carboxylic acid (CAS 13130-13-7)
- 5-(3-Nitrophenyl)-1H-pyrazole-3-carboxylic acid (CAS 1557038-82-0)
- 1-(4-Nitrophenyl)-1h-pyrazole-3-carboxylic acid (CAS 19532-43-5)
- 1-((4-Nitrophenyl)amino)-1H-pyrrole-2,5-dione (CAS 20970-39-2)
Recommended Standards
- 4-(3,5-Dioxo-4,5-dihydro-1,2,4-triazin-2(3H)-yl)benzoic acid (CAS 18510-65-1)
- 4-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)-2-hydroxybenzoic acid (CAS 19232-43-0)
- 6-Hydroxy-2-(4-nitrophenyl)pyrimidin-4(3H)-one (CAS 176100-76-8)
- Methyl 8-nitroquinoxaline-6-carboxylate (CAS 1706445-46-6)
- 5-Amino-2-methyl-1-phenethyl-1H-imidazole-4-carboxamide (CAS 447449-49-2)
- methyl 3-(aminomethyl)cyclopentane-1-carboxylate hydrochloride (CAS 2227204-94-4)
- 2,2-Dimethyl-1,3-diphenylpropane-1,3-dione (CAS 41169-42-0)
- 1-(4-Isopropylbenzyl)piperidine-4-carboxylic acid hydrochloride (CAS 1185298-68-3)
- 2-(3-Fluorophenyl)azepane (CAS 383130-06-1)
- 1-(1-Methylpiperidin-3-yl)-N-(thiophen-2-ylmethyl)methanamine (CAS 883531-70-2)
- 20047-65-8 (1R,4S)-7-Bromobicyclo[2.2.1]hept-2-ene DTXSID10505495 (CAS 20047-65-8)
- 1-(1,3-Dimethyl-1H-pyrazol-5-yl)-2-methylpropan-1-one (CAS 1592276-02-2)
- 2-(Allylthio)-4,6-dimethylnicotinonitrile (CAS 112629-72-8)
- Tirzepatide Impurity 36 (CAS CATO-C4X-324036)
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