5-Acetylthiophene-2-boronic acid pinacol ester, 97% CAS 942070-32-8
| CAS No. | 942070-32-8 |
| Molecular Formula | C12H17BO3S |
| Molecular Weight | 252.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 252.14 g/mol gives 5-Acetylthiophene-2-boronic acid pinacol ester, 97% distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-Acetylthiophene-2-boronic acid pinacol ester, 97% (CAS 942070-32-8) is a high-purity analytical reference standard with the molecular formula C12H17BO3S and a molecular weight of 252.14 g/mol.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 5-Acetylthiophene-2-boronic acid pinacol ester, 97% is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 252.14 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C12H17BO3S |
| Molecular Weight | 252.14 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Sulfur Atoms | 1 |
Related Acetylthiophene Standards
- 5-Acetylthiophene-3-boronic acid pinacol ester (CAS 1219628-58-6)
- Ethyl 5-acetylthiophene-2-carboxylate (CAS 33148-82-2)
- 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-carboxylic acid (CAS 13657-90-4)
- 4-Acetylthiophene-2-carboxylic acid (CAS 88105-23-1)
- 5-Acetylthiophene-3-carboxylic acid (CAS 33148-86-6)
Recommended Standards
- 5,7-Dichloro-2-(methylthio)thiazolo[4,5-d]pyrimidine (CAS 87789-35-3)
- 6,9-Dichloro-1,2,3,4-tetrahydroacridine (CAS 5396-25-8)
- 2,6-Dichloro-3-(4-methylbenzyl)pyridine (CAS 58597-10-7)
- 7,9-Dichloro-1,2,3,4-tetrahydroacridine (CAS 53618-66-9)
- 4-(Chloromethyl)-2-(1,3-dioxolan-2-yl)pyridine (CAS 1256824-16-4)
- 2-(3-Cyano-4-fluorophenyl)acetic acid (CAS 519059-11-1)
- 2-(4-(Benzyloxy)piperidin-1-yl)nicotinonitrile (CAS 1355482-99-3)
- 5-Fluorobenzofuran-6-carbaldehyde (CAS 199391-71-4)
- Ornidazole Impurity 73 (CAS CATO-C4X-133173)
- 2,2,2-Trifluoro-N-(3-fluoro-2-iodo-4-methoxyphenyl)acetamide (CAS 2586127-34-4)
- 3-Amino-5-methylpyrazine-2-carbonitrile (CAS 58091-66-0)
- (S)-1-Benzyl-6-(2-hydroxyethyl)piperazine-2,5-dione (CAS 2649789-07-9)
- Sodium 2-((((2R,3S,5R)-5-(5-((E)-2-bromovinyl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3-hydroxytetrahydrofuran-2-yl)methoxy)oxidophosphoryl)acetate (CAS 117707-11-6)
- Semaglutide impurity 38 (CAS CATO-C4X-222638)
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