![Molecular structure of 2-(Benzo[b]thiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 501945-71-7)](/images/chem_structures_svg/301/501945-71-7.svg)
2-(Benzo[b]thiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
Also known as: 2-(1-benzothiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 2-(1-benzothiophen-5-yl)-4, 2-dioxaborolane, benzo[b]thiophene-5-boronic acid pinacol ester, 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[b]thiophene, 2-(benzo[b]thiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
2-(Benzo[b]thiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 501945-71-7) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C14H17BO2S and a molecular weight of 260.160 g/mol. Key properties include a melting point of 118ºC, a boiling point of 377.7±15.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 182.2±20.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 501945-71-7
- Jingsj CID
- J-930551-5
- Molecular Formula
- C14H17BO2S
- Molecular Weight
- 260.160 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 118ºC |
|---|---|
| Boiling Point | 377.7±15.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 182.2±20.4 °C |
| Exact Mass | 260.104218 |
| PSA | 46.70000 |
| LogP | 3.20050 |
| Vapor Pressure | 0.0±0.8 mmHg at 25°C |
| Refractive Index | 1.570 |
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 2-(Benzo[b]thiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane?
The CAS number of 2-(Benzo[b]thiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane is 501945-71-7.
What are the molecular formula and molecular weight of 2-(Benzo[b]thiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane?
2-(Benzo[b]thiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane has molecular formula C14H17BO2S and molecular weight 260.160 g/mol.
What are the upstream and downstream products of 2-(Benzo[b]thiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane?
For 2-(Benzo[b]thiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, Upstream Products: 5-Bromobenzo[b]thiophene, Bis(pinacolato)diboron; Downstream Products: Benzo[b]thiophen-5-ylboronic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-(Benzo[b]thiophen-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 501945-71-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-930551-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.