4-Ethynyl-1H-pyrrole-2-carboxylic acid CAS 69151-83-3
| CAS No. | 69151-83-3 |
| Molecular Formula | C7H5NO2 |
| Molecular Weight | 135.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-Ethynyl-1H-pyrrole-2-carboxylic acid (CAS 69151-83-3), a certified reference material (molecular formula C7H5NO2, MW 135.12 g/mol) for analytical method development and quality control.
The molecular framework of 4-Ethynyl-1H-pyrrole-2-carboxylic acid (C7H5NO2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C7H5NO2 |
| Molecular Weight | 135.12 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
| Nitrogen Atoms | 1 |
Related Ethynyl Standards
- 4-Ethynyl-1H-imidazole-5-carboxamide (CAS 126004-16-8)
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- 6-Ethynyl-3-fluoro-2-methylpyridine (CAS 1256792-43-4)
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- 2-Ethynyl-3-fluoro-5-methylpyridine (CAS 1372103-91-7)
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Recommended Standards
- 4-azidophenol (CAS 24541-43-3)
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- Ethyl 4-((3-methoxybenzyl)amino)quinazoline-2-carboxylate (CAS 866155-31-9)
- 6-Bromo-3-ethyl-4-fluoro-3H-imidazo[4,5-c]pyridine (CAS 2416917-59-2)
- 5-((Benzyloxy)methyl)-5-(hydroxymethyl)-3-(propan-2-ylidene)dihydrofuran-2(3H)-one (CAS 932711-33-6)
- 3'-Bromo-4'-chloro-5-(5,5-dimethyl-1,3-dioxan-2-YL)valerophenone (CAS 898757-26-1)
- (S)-2-(2-(bis(4-(trifluoromethyl)phenyl)phosphanyl)-5-methoxyphenyl)-4-(tert-butyl)-4,5-dihydrooxazole (CAS 944836-20-8)
- 6-Chloro-5,7-dimethyl-3,4-dihydro-2H-benzo[b][1,4]oxazine (CAS 1267773-12-5)
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- 1-(1H-Pyrazol-3-yl)ethan-1-amine (CAS 1179072-43-5)
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Why CATO?
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