3-Methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophene

Also known as: 3-Methylthiophene-2-boronic acid pinacol ester, 4,4,5,5-Tetramethyl-2-(3-methylthiophen-2-yl)-1,3,2-dioxaborolane, 4,4,5,5-Tetramethyl-2-(3-methyl-2-thienyl)-1,3,2-dioxaborolane, 3-Methylthiophene-2-boronic acid pinacol ester 97%, 3-hydroxy-2,3-dimethylbutan-2-yl hydrogen (3-methylthiophen-2-yl)boronate, 1,3,2-dioxaborolane, 4,4,5,5-tetramethyl-2-(3-methyl-2-thienyl)-

3-Methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophene (CAS 885692-91-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H17BO2S and a molecular weight of 224.128 g/mol. Key properties include a melting point of 57-62ºC, a boiling point of 305.3±30.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 138.4±24.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 885692-91-1
Jingsj CID: J-1010976-9
Molecular Formula: C₁₁H₁₇BO₂S
Molecular Weight: 224.128 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	57-62ºC
Boiling Point	305.3±30.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	138.4±24.6 °C
Exact Mass	224.104233
PSA	46.70000
LogP	2.35570
Vapor Pressure	0.0±0.6 mmHg at 25°C
Refractive Index	1.501

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 3-Methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophene?

The CAS number of 3-Methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophene is 885692-91-1.

What are the molecular formula and molecular weight of 3-Methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophene?

3-Methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophene has molecular formula C11H17BO2S and molecular weight 224.128 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "3-Methyl-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophene (CAS 885692-91-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1010976-9 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.