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Dicumyl peroxide

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Dicumyl peroxide Basic information

Product Name:
Dicumyl peroxide
CAS:
80-43-3
MF:
C18H22O2
MW:
270.37
EINECS:
201-279-3
Mol File:
80-43-3.mol
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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 Sensitivity
4: 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 Reference
80-43-3(CAS DataBase Reference)
EPA Substance Registry System
Dicumyl peroxide (80-43-3)
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Safety Information

Hazard Codes 
O,Xi,N,Xn
Risk Statements 
7-36/38-51/53-36/37/38-20
Safety Statements 
14-3/7-36/37/39-61-14A-45-26-36-17
RIDADR 
UN 3110 5.2
WGK Germany 
2
RTECS 
SD8150000
4.2
TSCA 
Yes
HazardClass 
5.2
PackingGroup 
II
HS Code 
29096000
Hazardous Substances Data
80-43-3(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 4100 mg/kg

MSDS

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Dicumyl peroxide Usage And Synthesis

Chemical Properties

white powder

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.

General Description

White powder with a characteristic odor.

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.

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.]

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