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Dicumyl peroxide

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Dicumyl peroxide Basic information
Dicumyl peroxide Chemical Properties
  • 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
  • form flakes
  • color White
  • Water Solubility insoluble
  • Hydrolytic Sensitivity4: no reaction with water under neutral conditions
  • BRN 2056090
  • Stability: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 Reference80-43-3(CAS DataBase Reference)
  • EPA Substance Registry SystemDicumyl peroxide (80-43-3)
Safety Information
Dicumyl peroxide Usage And Synthesis
  • Chemical Propertieswhite powder
  • Chemical PropertiesDicumyl 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.
  • General DescriptionWhite powder with a characteristic odor.
  • Reactivity ProfileThe 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.
  • Safety ProfileMildly toxic by ingestion. See also PEROXIDES. When heated to decomposition it emits acrid smoke and irritating fumes.
  • Purification MethodsCrystallise the peroxide from 95% EtOH (charcoal). Store it at 0o. Potentially EXPLOSIVE. [Beilstein 6 IV 3220.]
Dicumyl peroxide Preparation Products And Raw materials
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