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3,3-dimethylphthalide

3,3-二甲基-2-苯并呋喃-1(3H)-酮

Also known as: 1(3H)-Isobenzofuranone, 3,3-dimethyl-, 3,3-Dimethyl-1,3-dihydroisobenzofuran-1-one, 3,3-Dimethyl-2-benzofuran-1(3H)-one, 3,3-dimethyl-1(3H)-Isobenzofuranone, 3,3-dimethyl-1,3-dihydro-1-isobenzofuranone, 3,3-dimethyl-2-benzofuran-1-one, 3,3-dimethyl-3-hydroisobenzofuran-1-one, dimethylphthalide

3,3-dimethylphthalide (CAS 1689-09-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H10O2 and a molecular weight of 162.18500 g/mol. It is also known as 1(3H)-Isobenzofuranone, 3,3-dimethyl-, 3,3-Dimethyl-1,3-dihydroisobenzofuran-1-one and 3,3-Dimethyl-2-benzofuran-1(3H)-one. Key properties include a melting point of 69-70ºC, a boiling point of 291.1ºC at 760mmHg, a density of 1.122g/cm3 and a flash point of 117.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
1689-09-4
Jingsj CID
J-1504933-5
Molecular Formula
C10H10O2
Chinese Name
3,3-二甲基-2-苯并呋喃-1(3H)-酮
Molecular Weight
162.18500 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point69-70ºC
Boiling Point291.1ºC at 760mmHg
Density1.122g/cm3
Flash Point117.8ºC

Frequently Asked Questions

What is the CAS number of 3,3-dimethylphthalide?

The CAS number of 3,3-dimethylphthalide is 1689-09-4.

What are the molecular formula and molecular weight of 3,3-dimethylphthalide?

3,3-dimethylphthalide has molecular formula C10H10O2 and molecular weight 162.18500 g/mol.

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

Last updated:

How to cite: Jingsj. "3,3-dimethylphthalide (CAS 1689-09-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1504933-5 (accessed 2026-10-22).

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