4-(4-Methoxyphenoxy)butyric Acid CAS 55579-99-2
| CAS No. | 55579-99-2 |
| Molecular Formula | C11H14O4 |
| Molecular Weight | 210.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-(4-Methoxyphenoxy)butyric Acid is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-(4-Methoxyphenoxy)butyric Acid (CAS 55579-99-2), molecular formula C11H14O4 and molecular weight 210.23 g/mol, is a CATO reference standard with documented purity and traceability.
4-(4-Methoxyphenoxy)butyric Acid (C11H14O4) 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 high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C11H14O4 |
| Molecular Weight | 210.23 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 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.) | 1972 |
Related Methoxyphenoxy Standards
- 4-(2-Methoxyphenoxy)butanoic acid (CAS 104215-93-2)
- (R)-3-(3-Methoxyphenoxy)butanoic acid (CAS 1136059-93-2)
- (S)-3-(3-Methoxyphenoxy)butanoic acid (CAS 1136059-97-6)
- Ethyl 2-(2-methoxyphenoxy)acetate (CAS 13078-21-2)
- 2-(3-Methoxyphenoxy)-2-methylpropanoic acid (CAS 140239-94-7)
- (R)-3-(4-methoxyphenoxy)butanoic acid (CAS 1416444-78-4)
- (S)-3-(2-Methoxyphenoxy)butanoic acid (CAS 1416444-96-6)
- (R)-3-(2-methoxyphenoxy)butanoic acid (CAS 1416445-13-0)
Recommended Standards
- 4-(4-Hydroxybutoxy)benzoic acid (CAS 23873-49-6)
- 4-(Benzo[d]oxazol-2-yl)aniline (CAS 20934-81-0)
- 4-(4,6-Dimethyl-2-oxopyrimidin-1(2H)-yl)butanoic acid (CAS 890626-61-6)
- 4-(Benzofuran-2-yl)phenol (CAS 26870-36-0)
- 1-((4-Methyl-4h-1,2,4-triazol-3-yl)thio)propan-2-amine (CAS 1341920-97-5)
- N-(Benzo[d][1,3]dioxol-5-ylmethyl)-5-methylpyrazine-2-carboxamide (CAS 606096-87-1)
- 1-(3-(Difluoromethoxy)phenyl)-5-oxopyrrolidine-3-carboxylic acid (CAS 1246967-17-8)
- 2-(4-(3-Bromophenyl)-4-methyl-2,5-dioxoimidazolidin-1-yl)-N-(2-(cyclohex-1-en-1-yl)ethyl)acetamide (CAS 956695-97-9)
- 2-{[(2,6-dichlorophenyl)methyl]sulfanyl}-4-(methylamino)-6-phenylpyrimidine-5-carbonitrile (CAS 320422-46-6)
- N-((1H-Benzo[d][1,2,3]triazol-1-yl)methyl)-4-methoxy-N-methylaniline (CAS 135840-40-3)
- 3-(2-hydroxyethyl)benzoic acid (CAS 320730-08-3)
- 1-benzyl-1-azaspiro[3.3]heptane (CAS 1223573-40-7)
- 4-Phenylthiazole-5-carboxylic acid (CAS 99822-84-1)
- Insulin Degludec Impurity 24 (CAS CATO-C4X-215724)
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