Indene CAS 95-13-6

What is Indene CAS 95-13-6？

Indene, also known as benzocyclopropene, is a polycyclic aromatic hydrocarbon with low toxicity and irritation to human skin and mucous membranes. It exists naturally in coal tar and crude oil. In addition, indene is also released when mineral fuels are not completely burned. Molecular formula C9H8. Molecular weight 116.16. The benzene ring and cyclopentadiene in its molecule share two adjacent carbon atoms. It appears as a colorless liquid, does not volatilize in vapor, turns yellow when standing still, but loses color when exposed to sunlight. Melting point -1.8°C, boiling point 182.6°C, flash point 58°C, relative density 0.9960 (25/4°C); insoluble in water, miscible with ethanol or ether. Indene molecules contain highly chemically active olefin bonds, which are prone to polymerization or addition reactions. Indene can polymerize at room temperature, and heating or in the presence of an acidic catalyst can increase the polymerization rate sharply, and react with concentrated sulfuric acid to form secondary indene resin. Indene is catalytically hydrogenated (see catalytic hydrogenation reaction) to form dihydroindene. The methylene group in the indene molecule is similar to the methylene group in the cyclopentadiene molecule. It is easily oxidized and reacts with sulfur to produce a complex, which has a weak acid reaction and reducing properties. Indene reacts with metallic sodium to form sodium salt, and condenses with aldehydes and ketones (see condensation reaction) to form benzofulvene: Indene is separated from the light oil fraction obtained from the distillation of coal tar in industry.

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Ứng dụng

Indene is mainly used to produce indene-coumarone resin. The raw material of indene-coumarone resin is the 160-215°C fraction distilled from heavy benzene and light oil fractions, which roughly contains 6% styrene, 4% coumarone, 40% indene, 5% 4-methylstyrene and a small amount of xylene, toluene and other compounds. The total amount of resin accounts for 60-70% of the Chemicalbook raw materials. Under the action of catalysts such as aluminum chloride, boron fluoride or concentrated sulfuric acid, indene and coumarone fractions are polymerized under pressure or without pressure to generate indene-coumarone resin. It can be mixed with other liquid hydrocarbons as a coating solvent. It can also be an intermediate of pesticides or mixed with other liquid hydrocarbons as a coating solvent.

Đóng gói

180 kg/drum