4-Nitro-1H-pyrrole-2-carboxylic acid hydrate CAS 1897739-23-9
| CAS No. | 1897739-23-9 |
| Molecular Formula | C5H4N2O4 |
| Molecular Weight | N/A |
| 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.
CATO supplies 4-Nitro-1H-pyrrole-2-carboxylic acid hydrate (CAS 1897739-23-9), a certified reference material (molecular formula C5H4N2O4H2O, MW 174.11 g/mol) for analytical method development and quality control.
Owing to a carbohydrate-derived structure, an amide group, 4-Nitro-1H-pyrrole-2-carboxylic acid hydrate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 174.11 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a certified reference material (CRM), 4-Nitro-1H-pyrrole-2-carboxylic acid hydrate 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 | C5H4N2O4 H2O |
| Molecular Weight | 174.11 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1995 |
| Nitrogen Atoms | 2 |
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- tert-Butyl N-(4-bromo-3-chlorophenyl)-N-ethylcarbamate (CAS 1881332-70-2)
- Methyl 2-amino-3-chloro-5-cyanobenzoate (CAS 1032667-96-1)
- 4-Aminochroman-8-carbonitrile hydrochloride (CAS 911824-58-3)
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- Semaglutide impurity 81 (CAS CATO-C4X-222681)
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