2-(2-Chloro-3-methylphenoxy)acetic acid CAS 579-65-7
| CAS No. | 579-65-7 |
| Molecular Formula | C9H9ClO3 |
| Molecular Weight | 200.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 2-(2-Chloro-3-methylphenoxy)acetic acid (CAS 579-65-7), a certified reference material (molecular formula C9H9ClO3, MW 200.62 g/mol) for analytical method development and quality control.
2-(2-Chloro-3-methylphenoxy)acetic acid (C9H9ClO3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 | C9H9ClO3 |
| Molecular Weight | 200.62 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
Related Chloro Standards
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Recommended Standards
- 2-(2-chloro-3-methoxyphenyl)acetic acid (CAS 78141-77-2)
- 2-(2-Chloro-4-methylphenoxy)acetic acid (CAS 583-23-3)
- 2-((4-Chloro-2-methylpyridin-3-yl)oxy)acetamide (CAS 287923-40-4)
- 2-(2-Chloro-5-methoxyphenyl)acetic acid (CAS 91367-10-1)
- Hexahydro-2H-isothiazolo[2,3-a]pyrazine 1,1-dioxide 2,2,2-trifluoroacetate (CAS 2138076-26-1)
- 8-chloro-1,3-dimethyl-9-nitroso-3,9-dihydro-1H-purine-2,6-dione (CAS CATO-C4X-25874)
- 3-(4-Chloro-1h-pyrazol-1-yl)propan-1-ol (CAS 1006319-94-3)
- 5,7-dimethyl-[1,2,4]triazolo[4,3-a]pyridine-3-carboxylic acid (CAS 1159830-76-8)
- 3-Amino-1-(3,4-dimethoxybenzyl)-4-(4-methoxyphenyl)azetidin-2-one (CAS 1291488-26-0)
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