5-(Ethoxycarbonyl)-4-methyl-1H-pyrrole-3-carboxylic acid CAS 90610-57-4
| CAS No. | 90610-57-4 |
| Molecular Formula | C9H11NO4 |
| Molecular Weight | 197.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 5-(Ethoxycarbonyl)-4-methyl-1H-pyrrole-3-carboxylic acid (C9H11NO4) 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
5-(Ethoxycarbonyl)-4-methyl-1H-pyrrole-3-carboxylic acid (CAS 90610-57-4) is a high-purity analytical reference standard with the molecular formula C9H11NO4 and a molecular weight of 197.19 g/mol.
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 | C9H11NO4 |
| Molecular Weight | 197.19 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 |
| 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 1 |
Related Ethoxycarbonyl Standards
- 3-(Ethoxycarbonyl)-4-methyl-1H-pyrrole-2-carboxylic acid (CAS 6277-13-0)
- 4-(Ethoxycarbonyl)-3-methyl-1H-pyrrole-2-carboxylic acid (CAS 90610-58-5)
- 4-(ethoxycarbonyl)-5-methyl-1H-pyrrole-2-carboxylic acid (CAS 21898-68-0)
- N-(Ethoxycarbonyl)nortropinone (CAS 32499-64-2)
- (5-(Ethoxycarbonyl)-1-methyl-1H-pyrazol-3-yl)boronic acid (CAS 2797070-55-2)
- (4-(Ethoxycarbonyl)cyclohex-1-en-1-yl)boronic acid (CAS 1443112-50-2)
- 3-(Ethoxycarbonyl)-1-methyl-1h-pyrazole-4-carboxylic acid (CAS 1174830-89-7)
- 5-(Ethoxycarbonyl)-1-methyl-1H-pyrazole-4-carboxylic acid (CAS 1174886-97-5)
Recommended Standards
- 5-(Dimethoxymethyl)picolinic acid (CAS 2055119-13-4)
- 5-(methoxycarbonyl)-2,4-dimethyl-1H-pyrrole-3-carboxylic acid (CAS 78331-73-4)
- 5-(Dimethoxymethyl)nicotinic acid (CAS 2140305-29-7)
- 5-(Pyrrolidin-1-yl)-2H-tetrazole-2-acetic acid (CAS 374822-49-8)
- n-Methyl-4-phenoxybutan-1-amine (CAS 91339-36-5)
- n-[(5-ethyl-1,3-oxazol-2-yl)methyl]-n-(pyrrolidin-3-yl)acetamide hydrochloride (CAS 1421601-19-5)
- (3-Chloro-5-(dimethylcarbamoyl)phenyl)boronic acid (CAS 957120-57-9)
- Telmisartan Impurity 32 (CAS 528560-94-3)
- 2-chloro-5-iodo-pyridin-3-amine (CAS 426463-09-4)
- 6-Chloro-N,N,2-trimethylpyrimidin-4-amine (CAS 58514-89-9)
- 3-((1,1-Dioxidothiomorpholino)methyl)-4-fluorobenzonitrile (CAS 1154385-79-1)
- 4-Methoxyphenylzinc iodide 0.5 M in Tetrahydrofuran (CAS 254454-47-2)
- Isopropyl 4-oxopentanoate (CAS 21884-26-4)
- (9-D-Asp) Semaglutide X Sodium salt (CAS CATO-CPTD788617)
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