6-Methylthieno[2,3-b]quinoline-2-carboxylic acid CAS 333312-07-5
| CAS No. | 333312-07-5 |
| Molecular Formula | C13H9NO2S |
| Molecular Weight | 243.28 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
6-Methylthieno[2,3-b]quinoline-2-carboxylic acid (CAS 333312-07-5) is a high-purity analytical reference standard with the molecular formula C13H9NO2S and a molecular weight of 243.28 g/mol.
The molecular framework of 6-Methylthieno[2,3-b]quinoline-2-carboxylic acid (C13H9NO2S) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. 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.
As a certified reference material (CRM), 6-Methylthieno[2,3-b]quinoline-2-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C13H9NO2S |
| Molecular Weight | 243.28 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Methylthieno Standards
- 7-Methylthieno[2,3-b]quinoline-2-carboxylic acid (CAS 333312-06-4)
- 8-Methylthieno[2,3-b]quinoline-2-carboxylic acid (CAS 333312-05-3)
- 2-((6-Methylthieno[2,3-d]pyrimidin-4-yl)thio)acetic acid (CAS 890014-20-7)
- 2-((6-Methylthieno[2,3-d]pyrimidin-4-yl)thio)acetamide (CAS 876901-73-4)
- (6-Methylthieno[3,4-d][1,3]dioxol-4-yl)(phenyl)methanol (CAS 944522-55-8)
- 3-methylthieno[2,3-b]pyridine-2,5-dicarboxylic acid (CAS 949984-37-6)
- 5-acetyl-3-methylthieno[2,3-b]pyridine-2-carboxylic acid (CAS 1050885-00-1)
- 2-((6-Ethyl-2-methylthieno[2,3-d]pyrimidin-4-yl)amino)acetic acid (CAS 848280-81-9)
Recommended Standards
- 6-Methyl-2-(thiophen-2-yl)-4H-3,1-benzoxazin-4-one (CAS 244205-65-0)
- 6-Morpholinopyridine-3-sulfonamide (CAS 90648-77-4)
- 6-Amino-5-(isopropoxymethyl)-2-thioxo-1,2-dihydropyrimidine-4-carboxylic acid (CAS 20865-50-3)
- 5-Hydroxy-4-(thiophen-3-yl)isoquinolin-1(2H)-one (CAS 656234-37-6)
- 4-Fluoro-3-methyl-N-(pyrrolidin-3-yl)benzamide (CAS 1835820-38-6)
- 5-Aminobicyclo[3.1.1]Heptane-1-carbonitrile (CAS 2170373-48-3)
- 1-Isopropyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indol-6-amine (CAS 945556-95-6)
- (S)-2-(4-((3,4-dichlorobenzyl)oxy)phenyl)-2,3-dihydrobenzo[b][1,4]dioxine-6-carbaldehyde (CAS 1246828-97-6)
- 6-Propoxy-5-indanecarbaldehyde (CAS 883532-67-0)
- 2-(2-Chloro-4-fluoro-5-iodophenoxy)-1,3-difluoro-5-(trifluoromethyl)benzene (CAS 2244084-74-8)
- 4-(Cyanomethoxy)benzamide (CAS 1042781-33-8)
- (η7-Cycloheptatrienyl)(η5-cyclopentadienyl)titanium(II) (CAS 51203-49-7)
- (6,7-Dihydro-5H-pyrazolo[5,1-b][1,3]oxazin-2-yl)(3-hydroxyazetidin-1-yl)methanone (CAS 1421457-07-9)
- Insulin Degludec Impurity 10 (CAS CATO-C4X-215710)
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