Benzoyl peroxide, also known as Benzoyl group or initiator BPO, is a widely used initiator in polymerization, mainly used for solvent polymerization of various solvents such as PVC, Polyacrylonitrile, acrylate, Vinyl acetate, and graft polymerization of Neoprene, SBS, and Methyl methacrylate. Unsaturated polyester resin curing, organic glass and other adhesive initiators, crosslinking agents. Today, we will introduce the physical property of Benzoyl peroxide.
The appearance of Benzoyl peroxide at room temperature is white crystalline powder, but we often see granular paste of Benzoyl group.
Benzoyl peroxide decomposes at 105 ℃ and atmospheric pressure. Its flash point is 125 ℃; The density of benzoyl peroxide at 25 ℃ is 1.16g/cm3.
Dibenzoyl peroxide is soluble in benzene, chloroform, and ether. Slightly soluble in ethanol and water, widely used in the chemical industry.
It should be noted that dibenzoyl peroxide is a strong oxidant and a very unstable substance that is prone to combustion. Various friction, impact, high temperature, strong light, or sulfur reducing agents can cause the combustion reaction of dibenzoyl peroxide. Therefore, to ensure the safety of benzoyl peroxide, we will dilute it to about 20% using insoluble salts such as calcium carbonate, calcium phosphate, and calcium sulfate, talc powder, and bentonite. Alternatively, when storing, it should be filled with 25-30% water.