4,4,5,5-Tetramethyl-2-(pyren-1-yl)-1,3,2-dioxaborolane

Also known as: 1-Pyreneboronic acid pinacol ester, 1-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrene, 2-(pyren-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, 4,4,5,5-Tetramethyl-2-(1-pyrenyl)-1,3,2-dioxaborolane, 1,3,2-Dioxaborolane, 4,4,5,5-tetramethyl-2-(1-pyrenyl)-

4,4,5,5-Tetramethyl-2-(pyren-1-yl)-1,3,2-dioxaborolane (CAS 349666-24-6) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C22H21BO2 and a molecular weight of 328.21200 g/mol. Key properties include a boiling point of 493.193ºC at 760 mmHg, a density of 1.17 and a flash point of 252.074ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 349666-24-6
Jingsj CID: J-1091386-7
Molecular Formula: C₂₂H₂₁BO₂
Molecular Weight: 328.21200 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	493.193ºC at 760 mmHg
Density	1.17
Flash Point	252.074ºC
Exact Mass	328.16300
PSA	18.46000
LogP	4.88320
Refractive Index	1.671

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 4,4,5,5-Tetramethyl-2-(pyren-1-yl)-1,3,2-dioxaborolane?

The CAS number of 4,4,5,5-Tetramethyl-2-(pyren-1-yl)-1,3,2-dioxaborolane is 349666-24-6.

What are the molecular formula and molecular weight of 4,4,5,5-Tetramethyl-2-(pyren-1-yl)-1,3,2-dioxaborolane?

4,4,5,5-Tetramethyl-2-(pyren-1-yl)-1,3,2-dioxaborolane has molecular formula C22H21BO2 and molecular weight 328.21200 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. "4,4,5,5-Tetramethyl-2-(pyren-1-yl)-1,3,2-dioxaborolane (CAS 349666-24-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1091386-7 (accessed 2026-11-09).

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