4-Acetyl-5-methyl-1H-pyrrole-3-carbaldehyde CAS 98491-67-9
| CAS No. | 98491-67-9 |
| Molecular Formula | C8H9NO2 |
| Molecular Weight | 151.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 4-Acetyl-5-methyl-1H-pyrrole-3-carbaldehyde (C8H9NO2) 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).
4-Acetyl-5-methyl-1H-pyrrole-3-carbaldehyde (CAS 98491-67-9), molecular formula C8H9NO2 and molecular weight 151.16 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C8H9NO2 |
| Molecular Weight | 151.16 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 |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 1 |
Recommended Standards
- 4-Acetyl-5-methyl-1H-pyrrole-2-carbaldehyde (CAS 5971-77-7)
- 4-Amino-3-methoxybenzaldehyde (CAS 90151-40-9)
- 4-Acetyl-3-methyl-1H-pyrrole-2-carbaldehyde (CAS 56015-72-6)
- 4-Cyanobicyclo[2.1.1]Hexane-1-carboxylic acid (CAS 2092839-61-5)
- 1-((2,4-Dichlorobenzyl)amino)propan-2-ol (CAS 412308-24-8)
- 2-(O-tolyl)propanoic acid (CAS 62835-95-4)
- 2-(3-Methylazetidin-1-yl)acetic acid hydrochloride (CAS 1803590-99-9)
- 2-Bromo-4-chloronicotinic acid (CAS 1256833-88-1)
- 2-(4-Hydroxy-piperidin-1-yl)-1-thiophen-2-yl-ethanone (CAS 1261235-32-8)
- 6-(2,5-Dimethyl-1H-pyrrol-1-yl)hexan-1-ol (CAS 280133-18-8)
- N-(4-Fluorobenzyl)-1-(1-isobutyl-1H-pyrazol-3-yl)methanamine hydrochloride (CAS 1856036-75-3)
- 2-Amino-2-(2-bromo-4-fluorophenyl)propanoic acid (CAS 1270505-27-5)
- 2,2'-((1,3,4-Thiadiazole-2,5-diyl)bis(sulfanediyl))diacetamide (CAS 73908-91-5)
- Anxiety Peptide (CAS 95237-86-8)
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