6-Methoxy-3-methyl-benzo[b]thiophene-2-carboxylic acid methyl ester CAS 82788-18-9
| CAS No. | 82788-18-9 |
| Molecular Formula | C12H12O3S |
| Molecular Weight | 236.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
6-Methoxy-3-methyl-benzo[b]thiophene-2-carboxylic acid methyl ester (CAS 82788-18-9) is a high-purity analytical reference standard with the molecular formula C12H12O3S and a molecular weight of 236.29 g/mol.
Based on its molecular formula C12H12O3S, 6-Methoxy-3-methyl-benzo[b]thiophene-2-carboxylic acid methyl ester contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 236.29 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C12H12O3S |
| Molecular Weight | 236.29 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Sulfur Atoms | 1 |
Related Methoxy Standards
- 2-Methoxy-5-((4-methylthiazol-2-yl)amino)phenol (CAS 933045-64-8)
- Methyl 5-methoxy-3-methylbenzo[b]thiophene-2-carboxylate (CAS 75416-70-5)
- Methyl 6-Methoxy-2-naphthylacetate-d6 (CAS 1246815-39-3)
- 1-(2-Methoxy-4-nitrophenyl)piperidine (CAS 118450-89-8)
- n-(2-(Methoxy(methyl)amino)-2-oxoethyl)-4-methylbenzamide (CAS 1209385-98-7)
- 4-Methoxy-1-(4-nitrophenyl)piperidine (CAS 1268153-91-8)
- 2-(Methoxy(naphthalen-1-yl)methyl)malononitrile (CAS 1395492-78-0)
- 1-(3-Methoxy-4-nitrophenyl)piperidine (CAS 352651-56-0)
Recommended Standards
- 6-Hydroxy-3-propyl-2-sulfanyl-3,4-dihydroquinazolin-4-one (CAS 209604-74-0)
- 6-Methyl-2-(((5-methylisoxazol-3-yl)methyl)thio)pyrimidin-4-amine (CAS 930861-26-0)
- 6,7-Dimethoxy-4-(methylthio)quinazoline (CAS 544461-27-0)
- Benzo[4,5]thieno[2,3-b]quinoxaline (CAS 243-69-6)
- 2-Fluoro-5-methoxypyridine-4-boronic acid (CAS 1451392-17-8)
- cis-3-fluoropiperidin-4-ol;hydrochloride (CAS 955028-89-4)
- 7,10-Dioxadispiro[3.1.4.1]undecan-2-one (CAS 2749864-49-9)
- 6-Chloro-8-iodo-2-methylimidazo[1,2-b]pyridazine (CAS 1298031-96-5)
- 1-Ethyl-4-(4-nitrophenyl)benzene (CAS 279242-09-0)
- 1-Iodobutane-d9 (stabilized with copper) (CAS 59012-24-7)
- 2-chloro-N-methyl-N-phenylpyridine-4-carboxamide (CAS 1019383-16-4)
- 2,3,4,5-Tetrahydrobenzo[f][1,4]oxazepine-8-carboxylic acid hydrochloride (CAS 2138332-97-3)
- tert-Butyl (3-bromo-5-formylbenzyl)carbamate (CAS 1393562-58-7)
- Semaglutide impurity 208 (CAS CATO-C4X-2226208)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com