4-chloro-1H-indole-2-carboxylic acid CAS 24621-73-6
| CAS No. | 24621-73-6 |
| Molecular Formula | C9H14ClNO2 |
| Molecular Weight | 203.67 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-chloro-1H-indole-2-carboxylic acid (CAS 24621-73-6) is a high-purity analytical reference standard with the molecular formula C9H14ClNO2 and a molecular weight of 203.67 g/mol.
Based on its molecular formula C9H14ClNO2, 4-chloro-1H-indole-2-carboxylic acid contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 203.67 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 4-chloro-1H-indole-2-carboxylic acid 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 | C9H14ClNO2 |
| Molecular Weight | 203.67 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1964 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related chloro Standards
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- 2-Chloro-4-(4-methylphenyl)pyridine (CAS 1202574-24-0)
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Recommended Standards
- 4-Chloro-[1,1'-biphenyl]-3-amine (CAS 57013-94-2)
- 4-chloro-1H-indole-5-carboxylic acid (CAS 251107-41-2)
- 4'-Chloro-[1,1'-biphenyl]-3-amine (CAS 56970-11-7)
- 4-chloro-1H-indole-6-carboxylic acid (CAS 885520-25-2)
- (4-Amino-6-methylpyrimidin-2-yl)glycine (CAS 89897-37-0)
- S-(2-Acetoxyacetyl)-p-mercaptotoluene (CAS 318257-80-6)
- 2-(2-Fluorophenyl)-2-(methylamino)acetamide (CAS 1218095-38-5)
- 3-[(4-chlorophenyl)methoxy]-4-methoxybenzaldehyde (CAS 423156-83-6)
- Nifuroxazide EP Impurity C (CAS 92-55-7)
- N-(4-Chlorophenyl)-5-ethyl-11-oxo-5H,5aH,6H,7H,8H,9H,11H-pyrido[2,1-b]quinazoline-3-carboxamide (CAS 1574584-05-6)
- 4-Bromo-1-(oxan-4-yl)-1H-imidazole (CAS 1353853-99-2)
- Ethyl 5-oxo-5-[4-(thiomorpholinomethyl)phenyl]valerate (CAS 898783-38-5)
- 2-(tert-Butyl)-4-nitrophenol (CAS 6683-81-4)
- Mast Cell Degranulating (MCD) Peptide (CAS 32908-73-9)
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