2-{5-methylthieno[2,3-b]thiophen-3-yl}acetic acid CAS 85504-38-7
| CAS No. | 85504-38-7 |
| Molecular Formula | C9H8O2S2 |
| Molecular Weight | 212.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-{5-methylthieno[2,3-b]thiophen-3-yl}acetic acid (C9H8O2S2) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
2-{5-methylthieno[2,3-b]thiophen-3-yl}acetic acid (CAS 85504-38-7) is a high-purity analytical reference standard with the molecular formula C9H8O2S2 and a molecular weight of 212.29 g/mol.
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 | C9H8O2S2 |
| Molecular Weight | 212.29 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1981 |
| Sulfur Atoms | 2 |
Related methylthieno Standards
- 2-{5-methylthieno[3,2-b]thiophen-3-yl}acetic acid (CAS 85504-42-3)
- methyl 3-methylthieno[3,2-b]pyridine-7-carboxylate (CAS 1861444-61-2)
- methyl 5-methylthieno[2,3-d]pyrimidine-4-carboxylate (CAS 2306272-41-1)
- methyl 6-methylthieno[2,3-d]pyrimidine-4-carboxylate (CAS 2306268-20-0)
- methyl 6-methylthieno[3,2-d]pyrimidine-4-carboxylate (CAS 2306269-09-8)
- methyl 7-methylthieno[3,2-d]pyrimidine-4-carboxylate (CAS 2306272-06-8)
- Methyl 3-methylthieno[2,3-c]pyridine-2-carboxylate (CAS 111043-08-4)
- Ethyl 3-methylthieno[2,3-b]pyridine-2-carboxylate (CAS 957059-45-9)
Recommended Standards
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- 2-Ethyl-5-(4-ethylphenyl)pyrimidine (CAS 208709-64-2)
- 2,2'-Dimethyl-[1,1'-biphenyl]-4,4'-diamine (CAS 84-67-3)
- 3-Bromo-N-(cyanomethyl)-2-methylbenzamide (CAS 1491360-65-6)
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- tert-Butyl 2-acetylpiperidine-1-carboxylate (CAS 201991-24-4)
- 2-Methoxy-3-trifluoromethylbenzophenone (CAS 1184116-42-4)
- Benzyl 2-amino-5-(benzyloxy)-4-methoxybenzoate hydrochloride (CAS 634197-80-1)
- 3-(2,3-Dihydrobenzofuran-5-yl)-2-propenoic acid (CAS 198707-57-2)
- Methyl 6-methyl-5-(trifluoromethyl)picolinate (CAS 1256794-37-2)
- Dibromo[2,2'-bis(diphenylphosphino)-1,1'-binaphthyl]palladium(II) (CAS 1147094-04-9)
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- D-Glu3-Tirzepatide (CAS CATO-CPTD788927)
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