7-chloro-1H-indole-4-carboxylic acid CAS 588688-45-3
| CAS No. | 588688-45-3 |
| Molecular Formula | C9H14ClNO2 |
| Molecular Weight | 203.67 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 7-chloro-1H-indole-4-carboxylic acid is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 203.67 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
7-chloro-1H-indole-4-carboxylic acid (CAS 588688-45-3) is a high-purity analytical reference standard with the molecular formula C9H14ClNO2 and a molecular weight of 203.67 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 | 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.) | 1984 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
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Recommended Standards
- 6-chloro-1H-indole-5-carboxylic acid (CAS 256935-86-1)
- 7-chloro-4-methyl-2H-pyrido[3,4-d]pyridazin-1-one (CAS 2654746-75-3)
- 6-Chloro-[1,1'-biphenyl]-3-amine (CAS 56970-25-3)
- 9-Chloro-2,3-dihydro-1H-cyclopenta[b]quinoline (CAS 40528-00-5)
- 1-(3,5-dimethoxybenzoyl)piperidine-4-carboxylic acid (CAS 352340-66-0)
- (6-(Cyclohexylthio)-4-methylpyridin-3-yl)(phenyl)methanone (CAS 1355193-52-0)
- (2,2-difluoro-1-methyl-cyclopropyl)methanesulfonyl chloride (CAS 1955548-58-9)
- Naphtho[2,3-d]isoxazol-3(2H)-one (CAS 94734-31-3)
- Verapamil Impurity N1 (CAS 102201-30-9)
- N-2-Propen-1-yl-3-(trifluoromethyl)benzenesulfonamide (CAS 730986-27-3)
- N-(4-((4-bromophenyl)thio)phenyl)-2,4-dichlorobenzamide (CAS 339104-60-8)
- 1-(2-(Trifluoromethyl)pyrimidin-5-yl)ethan-1-amine (CAS 1538757-63-9)
- Posaconazole Impurity 120 (CAS CATO-C4X-1208120)
- Semaglutide impurity 48 (CAS CATO-C4X-222648)
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