5-(Ethylthio)-2-methoxybenzoic acid CAS 4816-23-3
| CAS No. | 4816-23-3 |
| Molecular Formula | C10H12O3S |
| Molecular Weight | 212.27 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 5-(Ethylthio)-2-methoxybenzoic acid (CAS 4816-23-3), a certified reference material (molecular formula C10H12O3S, MW 212.27 g/mol) for analytical method development and quality control.
The molecular framework of 5-(Ethylthio)-2-methoxybenzoic acid (C10H12O3S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C10H12O3S |
| Molecular Weight | 212.27 g/mol |
| 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.) | 1958 |
| Sulfur Atoms | 1 |
Related Ethylthio Standards
- 2-((Ethylthio)methyl)-4-methylpyrimidine-5-carboxylic acid (CAS 1494489-46-1)
- 1-(Ethylthio)-3-(4-fluorophenyl)propan-2-one (CAS 1157221-95-8)
- 2-(Ethylthio)-1-(4-fluorophenyl)propan-1-one (CAS 1157361-86-8)
- 3-(Ethylthio)-1-(4-fluorophenyl)propan-1-one (CAS 1157736-71-4)
- 8-(Ethylthio)-1H-purine-2,6(3H,7H)-dione (CAS 73840-29-6)
- N-((2-(ethylthio)pyrimidin-5-yl)methyl)propan-2-amine (CAS 1279204-73-7)
- 2-(Ethylthio)benzo[d]thiazol-5-ol (CAS 439085-86-6)
- 2-(Ethylthio)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-ol (CAS 1710472-14-2)
Recommended Standards
- 5-(5-Methylthiophen-2-yl)-5-oxopentanoic acid (CAS 41042-93-7)
- 5,6,7,8-Tetrahydronaphthalene-2-sulfonic acid (CAS 93-12-9)
- 5-(3-Methyl-2-thienyl)-5-oxovaleric acid (CAS 951892-38-9)
- 6-(2-Hydroxyethyl)-5-methyl-2,3-dihydro-7H-thiazolo[3,2-a]pyrimidin-7-one (CAS 53750-92-8)
- 3-Bromo-1-ethyl-1H-pyrazolo[3,4-d]pyrimidine (CAS 1541551-42-1)
- Methyl 3-(4-Methoxyphenyl)-2-methyl-3-oxopropanoate (CAS 86109-34-4)
- methyl 3-amino-1-benzofuran-2-carboxylate (CAS 57805-85-3)
- 2,4-Dichloro-5-[(furan-2-ylmethyl)sulfamoyl]benzoic acid (CAS 31914-90-6)
- (2R)-piperazine-2-carboxylic acid (CAS 31321-68-3)
- D-(+)Biotin 2-Nitrophenyl Ester (CAS 131303-71-4)
- 2-((1H-Pyrrol-1-yl)methyl)benzoic acid (CAS 73217-14-8)
- 4-(Benzo[d][1,3]dioxol-5-ylmethyl)-N-(3,4-dichlorophenyl)piperazine-1-carboxamide (CAS 327974-99-2)
- 2-[(6-Cyclopropylamino-pyrimidin-4-ylamino)-methyl]-piperidine-1-carboxylic acid tert-butyl ester (CAS 1353956-33-8)
- Acetyl decapeptide-3 (CAS 935288-50-9)
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