4-Ethoxyphenylacetic Acid CAS 4919-33-9
| CAS No. | 4919-33-9 |
| Molecular Formula | C10H12O3 |
| Molecular Weight | 180.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 180.20 g/mol gives 4-Ethoxyphenylacetic Acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Ethoxyphenylacetic Acid (CAS 4919-33-9), molecular formula C10H12O3 and molecular weight 180.20 g/mol, is a CATO reference standard with documented purity and traceability.
4-Ethoxyphenylacetic Acid (C10H12O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C10H12O3 |
| Molecular Weight | 180.20 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, 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.) | 1958 |
Related Ethoxyphenylacetic Standards
Recommended Standards
- 4-Ethoxy-n-hydroxy-benzamidine (CAS 49773-26-4)
- 4-Ethyl-2-methoxybenzoic acid (CAS 3132-35-2)
- 4-Ethoxybenzhydrazide (CAS 58586-81-5)
- 4-Ethyl-3-methoxybenzoic acid (CAS 948553-28-4)
- 2-((2-Methoxyethyl)sulfonyl)benzoic acid (CAS 1016838-05-3)
- 3-(2-Aminopropan-2-yl)tetrahydrothiophene 1,1-dioxide (CAS 45936-76-3)
- 4-bromo-2-fluoro-benzoyl isocyanate (CAS 2755725-82-5)
- 2-(5-Bromo-2-fluorophenyl)propan-2-ol (CAS 1206774-43-7)
- Pyrido[2,3-b]pyrazin-7-ol (CAS 1023815-30-6)
- 4-[5-(phenylmethylidene)cyclopent-1-en-1-yl]morpholine (CAS 94708-08-4)
- n-(3-(1h-Pyrazol-1-yl)propyl)-[1,2,4]triazolo[4,3-a]pyrazin-8-amine (CAS 1376348-73-0)
- 2-Chloro-N-methyl-N-[(1-methyl-1h-pyrazol-4-yl)methyl]acetamide hydrochloride (CAS 1251925-34-4)
- Doxorubicin Olefin Impurity (CAS CATO-C4X-203318)
- Semaglutide impurity 47 (CAS CATO-C4X-222647)
Why CATO?
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