2-Ethynyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
Also known as: 1,3,2-Dioxaborolane, 2-ethynyl-4,4,5,5-tetramethyl-, 2-Ethynyl-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane, 2-Ethynyl-4,4,5,5-tetramethyl-[1,3,2]dioxaborlane, 2-Ethynyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane AldrichCPR, Ethynylboronic acid pinacol ester, Ethynylboronic Acid Pinacol Ester
2-Ethynyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 347389-74-6) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H13BO2 and a molecular weight of 151.999 g/mol. Key properties include a melting point of 25 °C, a boiling point of 132.6±23.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 34.0±22.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 347389-74-6
- Jingsj CID
- J-1081009-0
- Molecular Formula
- C8H13BO2
- Molecular Weight
- 151.999 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 25 °C |
|---|---|
| Boiling Point | 132.6±23.0 °C at 760 mmHg |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 34.0±22.6 °C |
| Exact Mass | 152.100861 |
| PSA | 18.46000 |
| LogP | 1.25100 |
| Vapor Pressure | 10.8±0.2 mmHg at 25°C |
| Refractive Index | 1.427 |
Frequently Asked Questions
What is the CAS number of 2-Ethynyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane?
The CAS number of 2-Ethynyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane is 347389-74-6.
What are the molecular formula and molecular weight of 2-Ethynyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane?
2-Ethynyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane has molecular formula C8H13BO2 and molecular weight 151.999 g/mol.
What are the upstream and downstream products of 2-Ethynyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane?
For 2-Ethynyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, Upstream Products: 2-Isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; Downstream Products: 3-Methoxycarbonylphenylboronic acid pinacol ester, Methyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate, Methyl 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate.
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-Ethynyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 347389-74-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1081009-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.