5-Methylbenzo[b]thiophene-2-boronic acid

5-甲基苯并[b]噻吩-2-硼酸

Also known as: (5-methyl-1-benzothiophen-2-yl)boronic acid, 2-Borono-5-methylbenzo[b]thiophene, 5-METHYLBENZOTHIOPHENE-2-BORONIC ACID, 5-Methylbenzothiphene-2-boronic acid, 5-methyl-1-benzothiophen-2-ylboronic acid, 5-methylbenzo[b]thiophen-2-ylboronic acid, Boronic acid, B-(5-Methylbenzo[b]thien-2-yl)-

5-Methylbenzo[b]thiophene-2-boronic acid (CAS 136099-65-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H9BO2S and a molecular weight of 192.04300 g/mol. It is also known as (5-methyl-1-benzothiophen-2-yl)boronic acid, 2-Borono-5-methylbenzo[b]thiophene and 5-METHYLBENZOTHIOPHENE-2-BORONIC ACID. Key properties include a melting point of 100ºC, a boiling point of 399.6ºC at 760mmHg, a density of 1.3g/cm3 and a flash point of 195.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
136099-65-5
Jingsj CID
J-1492710-4
Molecular Formula
C9H9BO2S
Chinese Name
5-甲基苯并[b]噻吩-2-硼酸
Molecular Weight
192.04300 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point100ºC
Boiling Point399.6ºC at 760mmHg
Density1.3g/cm3
Flash Point195.5ºC

Frequently Asked Questions

What is the CAS number of 5-Methylbenzo[b]thiophene-2-boronic acid?

The CAS number of 5-Methylbenzo[b]thiophene-2-boronic acid is 136099-65-5.

What are the molecular formula and molecular weight of 5-Methylbenzo[b]thiophene-2-boronic acid?

5-Methylbenzo[b]thiophene-2-boronic acid has molecular formula C9H9BO2S and molecular weight 192.04300 g/mol.

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

Last updated:

How to cite: Jingsj. "5-Methylbenzo[b]thiophene-2-boronic acid (CAS 136099-65-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1492710-4 (accessed 2026-10-24).

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