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1,2-Butadiene,3-methyl- (6CI,7CI,8CI,9CI)

Also known as: 1,1-Dimethylallylene, 1,2-butadiene,3-methyl-, 2-Methyl-2,3-butadiene, 3,3-DIMETHYLALLENE, 3-METHYL-1,2-BUTADIENE, 3-Methyl-1,2-butadiene, 3-methyl-buta-1,2-diene, 3-methylbuta-1,2-diene, CH2=C=C(CH3)2, Dimethylallene, EINECS 209-926-1, MFCD00008896

1,2-Butadiene,3-methyl- (6CI,7CI,8CI,9CI) (CAS 598-25-4) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H8 and a molecular weight of 68.11700 g/mol. Key properties include a melting point of −148 °C(lit.), a boiling point of 40-41 °C(lit.), a density of 0.694 g/mL at 25 °C(lit.) and a flash point of -12.2 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.

CAS No.
598-25-4
Jingsj CID
J-15361-7
Molecular Formula
C5H8
Molecular Weight
68.11700 g/mol
Category
Aliphatic Hydrocarbons
Last updated
11/2/2026

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Physicochemical Properties

Melting Point−148 °C(lit.)
Boiling Point40-41 °C(lit.)
Density0.694 g/mL at 25 °C(lit.)
Flash Point-12.2 °C
Exact Mass68.06260
LogP1.73750
Vapor Pressure6.87 psi ( 20 °C)
Refractive Indexn20/D 1.419(lit.)
Storage Conditions2-8°C

Frequently Asked Questions

What is the CAS number of 1,2-Butadiene,3-methyl- (6CI,7CI,8CI,9CI)?

The CAS number of 1,2-Butadiene,3-methyl- (6CI,7CI,8CI,9CI) is 598-25-4.

What are the molecular formula and molecular weight of 1,2-Butadiene,3-methyl- (6CI,7CI,8CI,9CI)?

1,2-Butadiene,3-methyl- (6CI,7CI,8CI,9CI) has molecular formula C5H8 and molecular weight 68.11700 g/mol.

What are the upstream and downstream products of 1,2-Butadiene,3-methyl- (6CI,7CI,8CI,9CI)?

For 1,2-Butadiene,3-methyl- (6CI,7CI,8CI,9CI), Upstream Products: 3-Chloro-3-methyl-1-butyne, 2-bromo-3-methylbut-2-ene, 3-Methyl-1-butyne; Downstream Products: 1,2-dibromo-3-methylbutane, 2,2-dimethyl-1,3-dioxolan-4-one, 2-Methylbut-2-ene.

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

Last updated:

How to cite: Jingsj. "1,2-Butadiene,3-methyl- (6CI,7CI,8CI,9CI) (CAS 598-25-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-15361-7 (accessed 2026-11-09).

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