3-Ethynylbenzo[b]thiophene CAS 569353-00-0
| CAS No. | 569353-00-0 |
| Molecular Formula | C10H6S |
| Molecular Weight | 158.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-Ethynylbenzo[b]thiophene meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
3-Ethynylbenzo[b]thiophene (CAS 569353-00-0), molecular formula C10H6S and molecular weight 158.22 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to sulfur-containing functionality, an aromatic ring system, 3-Ethynylbenzo[b]thiophene is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 158.22 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C10H6S |
| Molecular Weight | 158.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Sulfur Atoms | 1 |
Related Ethynylbenzo Standards
- 5-Ethynylbenzo[b]thiophene (CAS 1374563-50-4)
- 2-Ethynylbenzo[b]thiophene (CAS 141580-93-0)
- 7-Ethynylbenzo[b]thiophene (CAS 1516575-71-5)
- 4-Ethynylbenzo[b]thiophene (CAS 153798-78-8)
- 6-Ethynylbenzo[d]oxazol-2(3H)-one (CAS 1207594-32-8)
- 5-Ethynylbenzo[d]thiazole (CAS 1158749-23-5)
- 6-Ethynylbenzo[d]thiazole (CAS 864376-04-5)
- 4-Ethynylbenzo[c][1,2,5]thiadiazole (CAS 944245-18-5)
Recommended Standards
- 3-Ethyl-5-(methylsulfanyl)-4h-1,2,4-triazol-4-amine (CAS 98070-06-5)
- 3-methylsulfanylbicyclo[1.1.1]pentane-1-carboxylic acid (CAS 2387598-76-5)
- 3-Ethyl-1-methyl-2-thioxo-4-imidazolidinone (CAS 64895-98-3)
- 3-Propyl-2-thioxo-4-imidazolidinone (CAS 65710-56-7)
- (3aR,7aS)-Octahydro-1H-isoindole (CAS 1220913-24-5)
- Racemic-(3R,3aR,7aR)-tert-butyl 3-(aminomethyl)hexahydrofuro[3,4-c]pyridine-5(3H)-carboxylate (CAS 1350475-45-4)
- 6-Cyanopyridazine-4-carboxylic acid (CAS 2091707-99-0)
- (6-Methoxypyridin-2-yl)(3,4,5-trifluorophenyl)methanone (CAS 1187164-57-3)
- 2-Fluoro-5-(trifluoromethyl)benzohydrazide (CAS 1079843-54-1)
- Methyl 6-methylquinoline-8-carboxylate (CAS 1261661-22-6)
- 1-Boc-4-(6-Bromo-2-pyridyl)piperazine (CAS 331767-56-7)
- (dimethyl(phenyl)silyl)methanol (CAS 17881-97-9)
- Mexiletine-d6 Hydrochloride (CAS 1329835-60-0)
- Semaglutide impurity 290 (CAS CATO-C4X-2226290)
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