4-nitro-1H-pyrrole-2-carboxylic acid CAS 5930-93-8
| CAS No. | 5930-93-8 |
| Molecular Formula | C5H4N2O4 |
| Molecular Weight | 156.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-nitro-1H-pyrrole-2-carboxylic acid (CAS 5930-93-8) is a high-purity analytical reference standard with the molecular formula C5H4N2O4 and a molecular weight of 156.10 g/mol.
4-nitro-1H-pyrrole-2-carboxylic acid (C5H4N2O4) 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.
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 | C5H4N2O4 |
| Molecular Weight | 156.10 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.) | 1958 |
| Nitrogen Atoms | 2 |
Related nitro Standards
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- 3-Nitro-1h-pyrazole-4-carboxamide (CAS 39205-91-9)
- 3-Nitro-1h-pyrazole-5-carboxamide (CAS 297149-32-7)
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Recommended Standards
- 5,5,5-Trifluorovaleric Acid (CAS 407-62-5)
- 4-Hydroxy-6-oxo-1,6-dihydro-1,3,5-triazine-2-carboxamide (CAS 69391-08-8)
- 5,6-Dihydroxypyrimidine-4-carboxylic acid (CAS 52412-10-9)
- 4-Hydroxy-3-nitropyridine N-oxide (CAS 31872-57-8)
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- 5-Bromo-2-(4-chlorophenyl)pyrimidine (CAS 177727-15-0)
- 2-(1H-pyrazol-1-yl)ethanimidamide hydrochloride (CAS 1955541-67-9)
- 3-Nitro-5-(p-tolyloxy)aniline (CAS 832740-86-0)
- Arachidyl Arachidate (CAS 22432-80-0)
- Repaglinide Impurity 15 (CAS 1809091-07-3)
- 3-Amino-4-[(2-methoxyethyl)amino]benzoic acid (CAS 284672-81-7)
- 5-(2-Fluorophenyl)-2,4-dihydro-4-(2-propen-1-yl)-3H-1,2,4-triazole-3-thione (CAS 694461-61-5)
- S-Adenosyl-L-methionine disulfate di(4-methylbenzenesulfonate) salt (CAS 55722-12-8)
- Insulin Degludec Impurity 5 (CAS CATO-C4X-21575)
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