Dicumyl peroxide
[CAS# 80-43-3]

Identification

• Classification: Chemical reagent >> Silane reagent
• Name: Dicumyl peroxide
• Synonyms: Bis(1-methyl-1-phenylethyl) peroxide; Bis(alpha,alpha-dimethylbenzyl)peroxide; DCP
• Molecular Formula: C₁₈H₂₂O₂
• Molecular Weight: 270.37
• CAS Registry Number: 80-43-3
• EC Number: 201-279-3
• SMILES: CC(C)(C1=CC=CC=C1)OOC(C)(C)C2=CC=CC=C2

Properties

• Density: 1.56
• Melting point: 38-41 ºC
• Boiling point: 130 ºC
• Water solubility: insoluble

Safety Data

• Hazard Symbols: GHS02;GHS05;GHS08;GHS07;GHS09 Danger
• Hazard Statements: H242-H314-H315-H319-H360d-H411
• Precautionary Statements: P203-P210-P234-P235-P240-P260-P264-P264+P265-P273-P280-P301+P330+P331-P302+P352-P302+P361+P354-P304+P340-P305+P351+P338-P305+P354+P338-P316-P318-P321-P332+P317-P337+P317-P362+P364-P363-P370+P378-P391-P403-P405-P410-P411-P420-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Organic peroxides	Org. Perox.	F	H242
Chronic hazardous to the aquatic environment	Aquatic Chronic	2	H411
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2	H319
Reproductive toxicity	Repr.	1B	H360D
Reproductive toxicity	Repr.	1B	H360
Self-reactive substances or mixtures	Self-react.	F	H242
Skin sensitization	Skin Sens.	1B	H317
Organic peroxides	Org. Perox.	E	H242
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Reproductive toxicity	Repr.	1B	H360D

• Transport Information: UN 2121;UN 3110

Discovory and Applicatios

Dicumyl peroxide, also known as 1,1'-biphenyl-2,2'-diol peroxide, is a notable chemical compound recognized for its significant role in industrial processes and polymer chemistry. Discovered in the mid-20th century, dicumyl peroxide has since become an essential reagent in the synthesis and modification of polymers and other materials.

The discovery of dicumyl peroxide was part of a broader effort to identify effective peroxide compounds for initiating polymerization reactions. It emerged from research aimed at developing stable and efficient radical initiators. Its chemical structure, featuring two cumyl groups bonded to a peroxide linkage, endows it with notable stability and reactivity, which are crucial for its applications.

In polymer chemistry, dicumyl peroxide is widely used as a free radical initiator. It is particularly effective in the crosslinking of elastomers and thermoplastics. When decomposed, dicumyl peroxide generates free radicals that initiate polymerization or crosslinking reactions. This property is exploited in the production of various synthetic rubbers and resins, where control over polymer network formation is essential for achieving desirable material properties such as improved strength and elasticity.

In addition to its role in polymerization, dicumyl peroxide is utilized in the synthesis of certain organic compounds. Its ability to generate radicals makes it a valuable tool in organic synthesis, where it is employed in various oxidation reactions. For example, dicumyl peroxide can be used to oxidize alkenes to ketones, facilitating the formation of complex molecules required in pharmaceuticals and fine chemicals.

The stability of dicumyl peroxide compared to other peroxides makes it advantageous for industrial use. It is less prone to decomposition under normal storage conditions, allowing for safer handling and longer shelf life. Despite its stability, care must be taken during its use, as it remains a reactive compound that requires proper safety measures to prevent unwanted reactions or accidents.

Overall, dicumyl peroxide has proven to be a valuable compound in both polymer chemistry and organic synthesis. Its ability to generate radicals efficiently has led to its widespread use in the production of various materials and chemicals, highlighting its importance in industrial and research applications.