Dicumyl peroxide Property

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.

LogP

5.6 at 25℃

CAS DataBase Reference

80-43-3(CAS DataBase Reference)

EPA Substance Registry System

Dicumyl peroxide (80-43-3)

Safety

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

F 

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

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H242Heating may cause a fire

H315Causes skin irritation

H319Causes serious eye irritation

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P235Keep cool.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P308+P313IF exposed or concerned: Get medical advice/attention.

P370+P378In case of fire: Use … for extinction.

Dicumyl peroxide Chemical Properties,Usage,Production

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.

Uses

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.]