4-Ethylphenylboronic acid
Also known as: 4-ETHYLBENZENEBORONIC ACID, 4-ETHYLPHENYL BORONIC ACID, 4-ETHYLPHENYLBORONIC ACID, P-ETHYLPHENYLBORONIC ACID, AKOS BRN-0037, Boronic acid, B-(4-ethylphenyl)-, MFCD00859377, RARECHEM AH PB 0197
4-Ethylphenylboronic acid (CAS 63139-21-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H11BO2 and a molecular weight of 149.983 g/mol. Key properties include a melting point of 150-155 °C(lit.), a boiling point of 285.1±33.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 126.2±25.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 63139-21-9
- Jingsj CID
- J-32506-4
- Molecular Formula
- C8H11BO2
- Molecular Weight
- 149.983 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 150-155 °C(lit.) |
|---|---|
| Boiling Point | 285.1±33.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 126.2±25.4 °C |
| Exact Mass | 150.085205 |
| PSA | 40.46000 |
| LogP | 2.58 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.521 |
Frequently Asked Questions
What is the CAS number of 4-Ethylphenylboronic acid?
The CAS number of 4-Ethylphenylboronic acid is 63139-21-9.
What are the molecular formula and molecular weight of 4-Ethylphenylboronic acid?
4-Ethylphenylboronic acid has molecular formula C8H11BO2 and molecular weight 149.983 g/mol.
What are the upstream and downstream products of 4-Ethylphenylboronic acid?
For 4-Ethylphenylboronic acid, Upstream Products: Trimethyl borate, 1-Bromo-4-ethylbenzene, Tributyl borate; Downstream Products: 4-(4-Ethylphenyl)benzoic acid, 4-Ethylbiphenyl, 4-Acetyl-4'-ethylbiphenyl.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Ethylphenylboronic acid (CAS 63139-21-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-32506-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.