5-Acetylthiophene-3-carboxylic acid CAS 33148-86-6
| CAS No. | 33148-86-6 |
| Molecular Formula | C7H6O3S |
| Molecular Weight | 170.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Acetylthiophene-3-carboxylic acid (CAS 33148-86-6) is a high-purity analytical reference standard with the molecular formula C7H6O3S and a molecular weight of 170.19 g/mol.
Based on its molecular formula C7H6O3S, 5-Acetylthiophene-3-carboxylic acid 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 170.19 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).
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 | C7H6O3S |
| Molecular Weight | 170.19 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Sulfur Atoms | 1 |
Related Acetylthiophene Standards
- 3-Acetylthiophene-2-carboxylic acid (CAS 13657-90-4)
- 4-Acetylthiophene-2-carboxylic acid (CAS 88105-23-1)
- 5-Acetylthiophene-2-carboxamide(Arotinolol Impurity 7) (CAS 68257-89-6)
- Methyl 3-acetylthiophene-2-carboxylate (CAS 88105-18-4)
- Methyl 5-acetylthiophene-3-carboxylate (CAS 88770-21-2)
- Methyl 5-acetylthiophene-2-carboxylate(Arotinolol Impurity 6) (CAS 4101-81-9)
- 3-Acetylthiophene-2-carbaldehyde (CAS 16363-90-9)
- 4-Acetylthiophene-2-carbaldehyde (CAS 37815-63-7)
Recommended Standards
- 5,6-Dihydroimidazo[2,1-b]thiazole-3-carboxylic acid (CAS 933731-75-0)
- 5-Formyl-4-methylthiophene-2-carboxylic acid (CAS 391936-74-6)
- 4-Methyl-5-nitropyridine-2-thiol (CAS 25391-79-1)
- 5h,7h-Thieno[3,4-d]pyrimidine-2,4-diol (CAS 5719-34-6)
- 2-(p-Chlorophenyl)-1-[p-[2-(diethylamino)ethoxy]phenyl]-1-phenyl-ethanol (CAS 47642-02-4)
- 11-Mercaptoundecylphosphate (CAS 188678-49-1)
- 5-(Chloromethyl)-3-((2,6-dichlorophenoxy)methyl)-1,2,4-oxadiazole (CAS 850375-35-8)
- n-(4-{[(adamantan-1-yl)formohydrazido]carbonyl}phenyl)-2,5-dichlorothiophene-3-sulfonamide (CAS 743450-66-0)
- 4-Bromo-3-methyl-N-(1-methylethyl)benzenesulfonamide (CAS 1182913-23-0)
- Presatovir, >98% (HPLC) (CAS 1353625-73-6)
- 2-Isopropyl-pyrimidin-4-ylamine (CAS 114362-19-5)
- 1-(4-Fluorophenyl)piperidine-2,4-dione (CAS 952489-53-1)
- 4,7-dichloroquinazoline (CAS 2148-57-4)
- Semaglutide impurity 50 (CAS 2773558-66-8)
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