(2-Formyl-3-thienyl)boronic acid

2-醛基噻吩-3-硼酸

Also known as: (2-Formyl-3-thienyl)boronic acid, (2-Formylthiophen-3-yl)boronic acid, (2-formyl-3-thiophenyl)boronic acid, 2-FORMYL-3-THIOPHENEBORONIC ACID, 2-FORMYLTHIOPHENE-3-BORONIC ACID, 2-Formyl-3-thiopheneboronic acid, 2-Formylthien-3-ylboronic acid, 2-Formylthiophen-3-ylboronic acid, 2-Formylthiophene-3-boronic acid, 3-Boronothiophene-2-carboxaldehyde, 3-Borono-2-formylthiophene, Boronic acid, B-(2-formyl-3-thienyl)-, MFCD01075678

(2-Formyl-3-thienyl)boronic acid (CAS 4347-31-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H5BO3S and a molecular weight of 155.967 g/mol. It is also known as (2-Formylthiophen-3-yl)boronic acid, (2-formyl-3-thiophenyl)boronic acid and 2-FORMYL-3-THIOPHENEBORONIC ACID. Key properties include a melting point of 167-193 °C(lit.), a boiling point of 396.7±52.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 193.7±30.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
4347-31-3
Jingsj CID
J-42486-4
Molecular Formula
C5H5BO3S
Chinese Name
2-醛基噻吩-3-硼酸
Molecular Weight
155.967 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point167-193 °C(lit.)
Boiling Point396.7±52.0 °C at 760 mmHg
Density1.4±0.1 g/cm3
Flash Point193.7±30.7 °C

Frequently Asked Questions

What is the CAS number of (2-Formyl-3-thienyl)boronic acid?

The CAS number of (2-Formyl-3-thienyl)boronic acid is 4347-31-3.

What are the molecular formula and molecular weight of (2-Formyl-3-thienyl)boronic acid?

(2-Formyl-3-thienyl)boronic acid has molecular formula C5H5BO3S and molecular weight 155.967 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "(2-Formyl-3-thienyl)boronic acid (CAS 4347-31-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-42486-4 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.