4-(4-Chlorophenyl)-1H-pyrrole-3-carboxylic acid CAS 122453-98-9
| CAS No. | 122453-98-9 |
| Molecular Formula | C11H8ClNO2 |
| Molecular Weight | 221.64 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-(4-Chlorophenyl)-1H-pyrrole-3-carboxylic acid (CAS 122453-98-9), molecular formula C11H8ClNO2 and molecular weight 221.64 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, 4-(4-Chlorophenyl)-1H-pyrrole-3-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 221.64 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C11H8ClNO2 |
| Molecular Weight | 221.64 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chlorophenyl Standards
- 5-(3-Chlorophenyl)-1h-pyrrole-2-carboxylic acid (CAS 1048917-65-2)
- 5-(2-Chlorophenyl)-1h-pyrrole-2-carboxylic acid (CAS 1048919-09-0)
- 3-(4-Chlorophenyl)-1H-pyrazole-4-carbaldehydeoxime (CAS 1199253-23-0)
- 5-(4-Chlorophenyl)-3-methylisoxazole-4-carbaldehyde (CAS 1208081-07-5)
- 5-(3-Chlorophenyl)-3-methylisoxazole-4-carbaldehyde (CAS 1208081-72-4)
- 3-(4-Chlorophenyl)-6-methyl-1,2,4-triazin-5(2H)-one (CAS 126542-93-6)
- 3-(4-Chlorophenyl)-5-methylisoxazole-4-carbaldehyde (CAS 127426-59-9)
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