4,4,5,5-Tetramethyl-2-[4-(oxiran-2-ylmethoxy)phenyl]-1,3,2-dioxaborolane

Also known as: 4-(Oxiran-2-ylmethoxy)phenylboronic acid pinacol ester, 4-(2-Oxiranylmethoxy)benzeneboronic acid pinacol ester, 4,4,5,5-tetramethyl-2-[4-(oxiran-2-ylmethoxy)phenyl]-1,3,2-dioxaborolane, 1,3,2-Dioxaborolane, 4,4,5,5-tetramethyl-2-[4-(2-oxiranylmethoxy)phenyl]-

4,4,5,5-Tetramethyl-2-[4-(oxiran-2-ylmethoxy)phenyl]-1,3,2-dioxaborolane (CAS 664991-83-7) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C15H21BO4 and a molecular weight of 276.13600 g/mol. Key properties include a boiling point of 387.6ºC at 760 mmHg, a density of 1.11g/cm3 and a flash point of 188.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 664991-83-7
Jingsj CID: J-1009800-7
Molecular Formula: C₁₅H₂₁BO₄
Molecular Weight: 276.13600 g/mol
Category: Ethers
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	387.6ºC at 760 mmHg
Density	1.11g/cm3
Flash Point	188.2ºC
Exact Mass	276.15300
PSA	40.22000
LogP	1.76340
Refractive Index	1.515

Customs & Trade Information

HS Code	2931900090
Summary	2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 4,4,5,5-Tetramethyl-2-[4-(oxiran-2-ylmethoxy)phenyl]-1,3,2-dioxaborolane?

The CAS number of 4,4,5,5-Tetramethyl-2-[4-(oxiran-2-ylmethoxy)phenyl]-1,3,2-dioxaborolane is 664991-83-7.

What are the molecular formula and molecular weight of 4,4,5,5-Tetramethyl-2-[4-(oxiran-2-ylmethoxy)phenyl]-1,3,2-dioxaborolane?

4,4,5,5-Tetramethyl-2-[4-(oxiran-2-ylmethoxy)phenyl]-1,3,2-dioxaborolane has molecular formula C15H21BO4 and molecular weight 276.13600 g/mol.

What are the upstream and downstream products of 4,4,5,5-Tetramethyl-2-[4-(oxiran-2-ylmethoxy)phenyl]-1,3,2-dioxaborolane?

For 4,4,5,5-Tetramethyl-2-[4-(oxiran-2-ylmethoxy)phenyl]-1,3,2-dioxaborolane, Upstream Products: 2-[(4-Bromophenoxy)methyl]oxirane, Bis(pinacolato)diboron.

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-[4-(oxiran-2-ylmethoxy)phenyl]-1,3,2-dioxaborolane (CAS 664991-83-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1009800-7 (accessed 2026-11-09).

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