1,2,4,4-tetramethylcyclopentene

1,2,4,4-四甲基环戊烯

Also known as: 1,2,4,4-Tetramethyl cyclopentene, 1,2,4,4-Tetramethyl-1-cyclopentene, 1,2,4,4-Tetramethylcyclopenten, Cyclopentene, 1,2,4,4-tetramethyl-, Cyclopentene,1,2,4,4-tetramethyl

1,2,4,4-tetramethylcyclopentene (CAS 65378-76-9) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C9H16 and a molecular weight of 124.22300 g/mol. It is also known as 1,2,4,4-Tetramethyl cyclopentene, 1,2,4,4-Tetramethyl-1-cyclopentene and 1,2,4,4-Tetramethylcyclopenten. Key properties include a boiling point of 133.1ºC at 760 mmHg, a density of 0.794g/cm3 and a flash point of 21.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
65378-76-9
Jingsj CID
J-1437978-9
Molecular Formula
C9H16
Chinese Name
1,2,4,4-四甲基环戊烯
Molecular Weight
124.22300 g/mol
Category
Aliphatic Hydrocarbons
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point133.1ºC at 760 mmHg
Density0.794g/cm3
Flash Point21.9ºC

Frequently Asked Questions

What is the CAS number of 1,2,4,4-tetramethylcyclopentene?

The CAS number of 1,2,4,4-tetramethylcyclopentene is 65378-76-9.

What are the molecular formula and molecular weight of 1,2,4,4-tetramethylcyclopentene?

1,2,4,4-tetramethylcyclopentene has molecular formula C9H16 and molecular weight 124.22300 g/mol.

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

Last updated:

How to cite: Jingsj. "1,2,4,4-tetramethylcyclopentene (CAS 65378-76-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1437978-9 (accessed 2026-10-26).

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