4-Chloro-3-isobutoxythiophene-2-carboxylic acid CAS 1708079-49-5
| CAS No. | 1708079-49-5 |
| Molecular Formula | C9H11ClO3S |
| Molecular Weight | 234.70 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C9H11ClO3S, 4-Chloro-3-isobutoxythiophene-2-carboxylic acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 234.70 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
4-Chloro-3-isobutoxythiophene-2-carboxylic acid (CAS 1708079-49-5), molecular formula C9H11ClO3S and molecular weight 234.70 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C9H11ClO3S |
| Molecular Weight | 234.70 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
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Recommended Standards
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- 2-(3-Chlorophenyl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazole (CAS 2416673-68-0)
- 4-amino-1-[(2R,4S,5S)-4-azido-5-(hydroxymethyl)tetrahydrofuran-2-yl]pyrimidin-2-one (CAS 84472-89-9)
- 2-Amino-3-fluoropropan-1-ol (CAS 166665-93-6)
- (1R)-6-Oxaspiro[2.5]octan-1-amine (CAS 909406-68-4)
- 4-methyl-6-(methylsulfanyl)-1H-pyrazolo[3,4-d]pyrimidine (CAS 1408075-41-1)
- Ethyl 2-(hydroxymethyl)pyridine-4-carboxylate (CAS 31804-60-1)
- N-[4-(2-Methoxyethoxy)benzyl]cyclopentanamine (CAS 1040686-86-9)
- Semaglutide impurity 259 (CAS CATO-C4X-2226259)
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