4H-Thieno[3,2-c][1]benzopyran-2-carboxylic acid CAS 26268-04-2
| CAS No. | 26268-04-2 |
| Molecular Formula | C12H8O3S |
| Molecular Weight | 232.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4H-Thieno[3,2-c][1]benzopyran-2-carboxylic acid (CAS 26268-04-2) is a high-purity analytical reference standard with the molecular formula C12H8O3S and a molecular weight of 232.26 g/mol.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 4H-Thieno[3,2-c][1]benzopyran-2-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 232.26 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 4H-Thieno[3,2-c][1]benzopyran-2-carboxylic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C12H8O3S |
| Molecular Weight | 232.26 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
| Sulfur Atoms | 1 |
Related H Standards
- (2S)-2-({thieno[2,3-d]pyrimidin-4-yl}amino)propanoic acid (CAS 63895-63-6)
- 2-({thieno[2,3-d]pyrimidin-4-yl}amino)propanoic acid (CAS 71635-48-8)
- 1-Thieno[2,3-d]pyrimidin-4-ylpiperidin-4-one (CAS 1094427-64-1)
- Thieno[2,3-c]pyridine-2-sulfonyl chloride (CAS 1191545-48-8)
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- thieno[2,3-b]pyridine-5-sulfonyl chloride (CAS 1864060-96-7)
- Thieno[2,3-c]pyridine-4-sulfonyl chloride (CAS 1936220-93-7)
- Thieno[3,2-b]pyridine-2-sulfonyl chloride (CAS 209287-06-9)
Recommended Standards
- 4-Formylphenyl thiophene-2-carboxylate (CAS 331948-76-6)
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- 4-Benzoylthiophene-3-carboxylic acid (CAS 30011-77-9)
- 5-(2-Aminothiazol-4-yl)-1h-benzo[d]imidazol-2(3h)-one (CAS 927969-91-3)
- 3-Chloro-4-(methylsulfonyl)thiophene-2-carbonyl chloride (CAS 175201-87-3)
- 6-Fluoro-4-methyl-2,3-dihydro-1,4-benzoxazine (CAS 1267334-42-8)
- 5-Acetamido-3-methylisothiazole-4-carboxylic acid (CAS 51674-31-8)
- 3-(5-Methyl-1H-indazol-3-yl)propan-1-amine (CAS 1520881-08-6)
- 2-Amino-N-((S)-1-benzylpyrrolidin-3-yl)-N-isopropylpropanamide (CAS 1354032-59-9)
- 2,8-Dimethyl-[1,2,4]triazolo[1,5-a]pyridine (CAS 4931-19-5)
- 3-[(2,5-Dimethylphenyl)sulfonylamino]propanoic acid (CAS 568566-41-6)
- 1-(3-Ethoxy-4-methoxyphenyl)-N-methylmethanamine hydrochloride (CAS 1158287-40-1)
- Methyl 6-(bromomethyl)-2,3-difluorobenzoate (CAS 1260671-51-9)
- D-Gln19-Tirzepatide (CAS CATO-CPTD788915)
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