Ethyl 4-methoxy-2,3-dimethylbenzoate CAS 128209-84-7
| CAS No. | 128209-84-7 |
| Molecular Formula | C12H16O3 |
| Molecular Weight | 208.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Ethyl 4-methoxy-2,3-dimethylbenzoate (CAS 128209-84-7), a certified reference material (molecular formula C12H16O3, MW 208.25 g/mol) for analytical method development and quality control.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Ethyl 4-methoxy-2,3-dimethylbenzoate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 208.25 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.
Physical & Chemical Properties
| Molecular Formula | C12H16O3 |
| Molecular Weight | 208.25 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
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Recommended Standards
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- (2s)-2-{[(tert-butoxy)carbonyl]amino}hex-5-ynoic acid (CAS 208522-16-1)
- 5-Fluoro-2-methoxy-3-methylpyridine (CAS 884494-89-7)
- 3-Cyclopropoxy-4-(methylthio)pyridin-2-amine (CAS 1243451-88-8)
- 1-Chloroanthracene (CAS 4985-70-0)
- Semaglutide impurity 257 (CAS CATO-C4X-2226257)
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