3-Methoxy-4-methylbenzoic Acid CAS 7151-68-0
| CAS No. | 7151-68-0 |
| Molecular Formula | C9H10O3 |
| Molecular Weight | 166.17 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 3-Methoxy-4-methylbenzoic Acid (CAS 7151-68-0), a certified reference material (molecular formula C9H10O3, MW 166.17 g/mol) for analytical method development and quality control.
3-Methoxy-4-methylbenzoic Acid (C9H10O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C9H10O3 |
| Molecular Weight | 166.17 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.) | 1959 |
Related Methoxy Standards
- 6-Methoxy-2,3-dihydrobenzofuran-3-ol (CAS 1340253-23-7)
- 2-Methoxy-3-methylbenzoic Acid (CAS 26507-91-5)
- 2-Methoxy-5-methylbenzoic acid (CAS 25045-36-7)
- 2-Methoxy-6-methylbenzoic Acid (CAS 6161-65-5)
- 3-Methoxy-5-methylbenzoic Acid (CAS 62089-34-3)
- 4-Methoxy-2-methylbenzoic Acid (CAS 6245-57-4)
- 4-Methoxy-3-methylbenzoic Acid (CAS 6880-04-2)
- 4-Methoxy-6-methylsalicylaldehyde (CAS 34883-08-4)
Recommended Standards
- 3-Hydroxy-3-phenylpropanoic acid (CAS 3480-87-3)
- 3-Hydroxy-2,6-dimethylbenzoic acid (CAS 90536-18-8)
- 3-Methoxyphenyl acetate (CAS 5451-83-2)
- 3-Ethylsalicylic Acid (CAS 4295-51-6)
- Ethyl 2-methoxynicotinate (CAS 16498-79-6)
- Tert-butyl (2-bromo-1-phenylethyl)carbamate (CAS 478538-80-6)
- N-(4-Amino-2-methylphenyl)-2-[2-(sec-butyl)-phenoxy]butanamide (CAS 1020055-25-7)
- (3S,4S,5S)-3-(Hydroxymethyl)hexahydropyridazine-4,5-diol (CAS 226988-04-1)
- N-(2-Fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)methanesulfonamide (CAS 501693-40-9)
- 2-((3-Cyano-6-phenyl-4-(p-tolyl)pyridin-2-yl)thio)-N-(2-methyl-4-nitrophenyl)acetamide (CAS 332128-06-0)
- Ethyl 2-(4-chloro-5H-pyrrolo[3,2-d]pyrimidin-5-yl)acetate (CAS 871024-59-8)
- (S)-(-)-3-(3-Hydroxyphenyl)-N-propylpiperidine Hydrochloride (CAS 88768-67-6)
- 1-(2,4,6-Trimethylbenzenesulfonyl)piperidine-4-carboxylic acid (CAS 394245-69-3)
- Semaglutide Impurity 124 (CAS CATO-C4X-2226124)
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