4-Formyl-3-nitro-1H-pyrrole-2-carboxylic acid CAS 36131-57-4
| CAS No. | 36131-57-4 |
| Molecular Formula | C6H4N2O5 |
| Molecular Weight | 184.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 184.11 g/mol gives 4-Formyl-3-nitro-1H-pyrrole-2-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Formyl-3-nitro-1H-pyrrole-2-carboxylic acid (CAS 36131-57-4) is a high-purity analytical reference standard with the molecular formula C6H4N2O5 and a molecular weight of 184.11 g/mol.
4-Formyl-3-nitro-1H-pyrrole-2-carboxylic acid (C6H4N2O5) 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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 | C6H4N2O5 |
| Molecular Weight | 184.11 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
| Nitrogen Atoms | 2 |
Related Formyl Standards
- Ethyl 4-formyl-2-hydroxy-1H-imidazole-5-carboxylate (CAS 462095-37-0)
- 3-Formyl-4-methyl-1H-indole-7-carbonitrile (CAS 1190319-54-0)
- 7-Formyl-1-methyl-1H-indole-3-carbonitrile (CAS 1373137-76-8)
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- 1-Formyl-2-methyl-3-indolizinecarbonitrile (CAS 685891-12-7)
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Recommended Standards
- 4-Amino-3,5-dinitropyridine (CAS 31793-29-0)
- 4-Hydroxy-4-(trifluoromethyl)tetrahydro-2H-pyran-2-one (CAS 83191-83-7)
- 3-Nitro-[1,2,4]triazolo[5,1-c][1,2,4]triazin-4(1H)-one (CAS 83809-87-4)
- 4-Hydroxy-5-nitronicotinic acid (CAS 911461-03-5)
- Ethyl 2-(2-nitrophenylsulfonyl)acetate (CAS 60781-34-2)
- Ethyl (E)-hept-4-enoate (CAS 54340-70-4)
- 4-Cyano-5-methoxy-1H-indazole (CAS 1352395-32-4)
- 2,5-Bis[2-(2-methoxyethoxy)ethoxy]terephthalaldehyde (CAS 1628897-24-4)
- 6-Nitrobenzoxazole (CAS 17200-30-5)
- 4-Bromo-2-cyano-5-hydroxybenzene-1-sulfonyl chloride (CAS 1805190-67-3)
- 3-(((4-Bromobenzyl)sulfinyl)methyl)-5-((2,6-dichlorobenzyl)thio)-4-ethyl-4H-1,2,4-triazole (CAS 344275-04-3)
- [(2-Fluorophenyl)methyl](prop-2-en-1-yl)amine (CAS 626218-15-3)
- 2-Propenoic acid, polymer with ethyl 2-propenoate, 2-propenal and 2-propenenitrile (CAS 66028-07-7)
- Exenatide (CAS 141758-74-9（free base）)
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