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HomeProduct name listDicumyl peroxide

Dicumyl peroxide

Synonym(s):Bis(α,α-dimethylbenzyl) peroxide;Bis(1-methyl-1-phenylethyl) peroxide

  • CAS NO.:80-43-3
  • Empirical Formula: C18H22O2
  • Molecular Weight: 270.37
  • MDL number: MFCD00675945
  • EINECS: 201-279-3
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-05-15 10:43:20
Dicumyl peroxide Structural

What is Dicumyl peroxide?

Chemical properties

Dicumyl peroxide is a crystalline solid that melts at 42°C. It is insoluble in water and soluble in vegetable oil and organic solvents . It is used as a high-temperature catalyst in production of polystyrene plastics. The deflagration hazard potential of this peroxide was tested using 5 g of igniter in the revised time–pressure test, but no pressure rise was produced . Noller et al. found it to be an intermediate fire hazard.

The Uses of Dicumyl peroxide

Dicumyl peroxide(DCP) is used:
in vulcanization of rubber
as a crosslinking agent in the synthesis of polylactic acid composite fibers
in the preparation of polyethylene composites
in the synthesis of polyamide 112/ethylene vinyl acetate copolymer blends.

General Description

Dicumyl peroxide is a pale yellow to white granular solid with a characteristic odor. It is used as a polymerization catalyst and vulcanizing agent.

Reactivity Profile

The explosive instability of the lower dialkyl peroxides (e.g., dimethyl peroxide) and 1,1-bis-peroxides decreases rapidly with increasing chain length and degree of branching, the di-tert-alkyl derivatives being amongst the most stable class of peroxides. Though many 1,1-bis-peroxides have been reported, few have been purified because of the higher explosion hazards compared with the monofunctional peroxides. Dicumyl peroxide is unlikely that this derivative would be particularly unstable compared to other peroxides in it's class, Bretherick 2nd ed., p 44 1979.

Flammability and Explosibility

Non flammable

Safety Profile

Mildly toxic by ingestion. See also PEROXIDES. When heated to decomposition it emits acrid smoke and irritating fumes.

Purification Methods

Crystallise the peroxide from 95% EtOH (charcoal). Store it at 0o. Potentially EXPLOSIVE. [Beilstein 6 IV 3220.]

Properties of Dicumyl peroxide

Melting point: 39-41 °C (lit.)
Boiling point: 130°C
Density  1.56 g/mL at 25 °C (lit.)
vapor density  9.3 (vs air)
vapor pressure  15.4 mm Hg ( 38 °C)
refractive index  1.5360
Flash point: >230 °F
storage temp.  2-8°C
solubility  Chloroform (Slightly), DMSO (Slightly), Methanol (Slightly)
form  flakes
color  White
Water Solubility  insoluble
Hydrolytic Sensitivity 4: no reaction with water under neutral conditions
BRN  2056090
Stability: Reacts violently with reducing agents, heavy metals, concentrated acids, concentrated bases. May ignite organic materials on contact. May decompose violently upon exposure to sunlight or if heated. Incompatible with strong oxidizing agents.
CAS DataBase Reference 80-43-3(CAS DataBase Reference)
EPA Substance Registry System Dicumyl peroxide (80-43-3)

Safety information for Dicumyl peroxide

Signal word Danger
Pictogram(s)
ghs
Flame
Flammables
GHS02
ghs
Exclamation Mark
Irritant
GHS07
ghs
Health Hazard
GHS08
ghs
Environment
GHS09
GHS Hazard Statements H242:Self-reactive substances and mixtures; and Organic peroxides
H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
H411:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P235:Keep cool.
P273:Avoid release to the environment.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P308+P313:IF exposed or concerned: Get medical advice/attention.
P370+P378:In case of fire: Use … for extinction.

Computed Descriptors for Dicumyl peroxide

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