5-Chloro-3-methyl-2,3-dihydrobenzofuran-2-carboxylic acid CAS 230293-44-4
| CAS No. | 230293-44-4 |
| Molecular Formula | C10H9ClO3 |
| Molecular Weight | 212.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
5-Chloro-3-methyl-2,3-dihydrobenzofuran-2-carboxylic acid (CAS 230293-44-4), molecular formula C10H9ClO3 and molecular weight 212.63 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-Chloro-3-methyl-2,3-dihydrobenzofuran-2-carboxylic acid (C10H9ClO3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 212.63 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
As a certified reference material (CRM), 5-Chloro-3-methyl-2,3-dihydrobenzofuran-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 | C10H9ClO3 |
| Molecular Weight | 212.63 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2022 |
| Halogen Content | Cl-containing |
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Recommended Standards
- 5-Chloro-2-methyl-2,3-dihydrobenzofuran-7-carboxylic acid (CAS 31457-04-2)
- 6-Chlorochroman-2-carboxylic acid (CAS 40026-24-2)
- 5-Chloro-2-cyclopropoxybenzoic acid (CAS 959749-03-2)
- 6-Chlorochroman-4-carboxylic Acid (CAS 76301-94-5)
- (S)-N-(1,5-dihydroxypentan-2-yl)benzamide (CAS 296766-74-0)
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- 3-(Difluoromethyl)-4-(trifluoromethoxy)picolinonitrile (CAS 1361879-44-8)
- 2-Methoxy-N-(3-methylpentan-2-yl)aniline (CAS 1036554-95-6)
- 3-Chloro-4-(difluoromethoxy)benzimidamide (CAS 1250558-67-8)
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- 3,5-Dibromo-1-[2-(4-fluorophenoxy)ethyl]-1H-1,2,4-triazole (CAS 1240571-04-3)
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