2-Phenylethyl-1-boronic acid pinacol ester

Also known as: 2-Phenylethylboronic acid pinacol ester, 2-Phenylethylboronic acid, pinacol ester, 4,4,5,5-Tetramethyl-2-phenethyl-1,3,2-dioxaborolane, 4,4,5,5-Tetramethyl-2-(2-phenylethyl)-1,3,2-dioxaborolane, 2-(2-Phenylethyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 1,3,2-Dioxaborolane, 4,4,5,5-tetramethyl-2-(2-phenylethyl)-, MFCD03788721, PhCH2CH2Bpin

2-Phenylethyl-1-boronic acid pinacol ester (CAS 165904-22-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C14H21BO2 and a molecular weight of 232.12600 g/mol. Key properties include a melting point of 31-33°C, a boiling point of 290.3ºC at 760 mmHg, a density of 0.97g/cm3 and a flash point of 129.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 165904-22-3
Jingsj CID: J-36811-6
Molecular Formula: C₁₄H₂₁BO₂
Molecular Weight: 232.12600 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	31-33°C
Boiling Point	290.3ºC at 760 mmHg
Density	0.97g/cm3
Flash Point	129.4ºC
Exact Mass	232.16300
PSA	18.46000
LogP	3.32130
Vapor Pressure	0.00363mmHg at 25°C
Refractive Index	1.486

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 2-Phenylethyl-1-boronic acid pinacol ester?

The CAS number of 2-Phenylethyl-1-boronic acid pinacol ester is 165904-22-3.

What are the molecular formula and molecular weight of 2-Phenylethyl-1-boronic acid pinacol ester?

2-Phenylethyl-1-boronic acid pinacol ester has molecular formula C14H21BO2 and molecular weight 232.12600 g/mol.

What are the upstream and downstream products of 2-Phenylethyl-1-boronic acid pinacol ester?

For 2-Phenylethyl-1-boronic acid pinacol ester, Upstream Products: Bis(pinacolato)diboron, Pinacolborane, (2-Chloroethyl)benzene; Downstream Products: 3-Phenyl-1-propylboronic acid pinacol ester, (2-Chloroethyl)benzene, Phenethyl alcohol.

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. "2-Phenylethyl-1-boronic acid pinacol ester (CAS 165904-22-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-36811-6 (accessed 2026-11-09).

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