2.5-Bistert-butyl peroxide-2.5-dimethyhexane Cas 78-63-7

2.5-Bis(tert-butyl peroxide)-2.5-dimethyhexane

Other Names: BPDH, cr05;DPDH;ad40c;varox;luperox;varox50;

VAROX DBPH;kayahexaad;luperox101;perhexa25b

CAS Number: 78-63-7

Molecular Formula: C16H34O4

2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane Properties

Melting point6 °C

Boiling point55-57 °C7 mm Hg(lit.)

Density0.877 g/mL at 25 °C(lit.)

refractive indexn20/D 1.423(lit.)

Flash point149 °F

storage temp.2-8°C

Water Solubilityimmiscible

StabilityUnstable. May contain an inhibitor. Incompatible with strong oxidizing agents, acids, reducing agents, organic materials, powdered metals.

Chemical Properties

colourless to light yellow liquid

Uses

Polymerization initiator

Uses

Initiates degradation of polypropylene, monomer scavenger in styrene polymerization. Free radical polymerization initiator.

General Description

Clear, yellow liquid. also for storage and transport mixed with inert solid.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Peroxides, such as 2,5-DIMETHYL-2,5-DI-(TERT-BUTYLPEROXY)HEXANE, are good oxidizing agents. Organic compounds can ignite on contact with concentrated peroxides. Strongly reduced material such as sulfides, nitrides, and hydrides may react explosively with peroxides. There are few chemical classes that do not at least produce heat when mixed with peroxides. Many produce explosions or generate gases (toxic and nontoxic). Generally, dilute solutions of peroxides (<70%) are safe, but the presence of a catalyst (often a transition metal such as cobalt, iron, manganese, nickel, or vanadium) as an impurity may even then cause rapid decomposition, a buildup of heat, and even an explosion. Solutions of peroxides often become explosive when evaporated to dryness or near-dryness. Danger of explosion when dry. May explode from heat, shock, friction or contamination. May ignite combustibles (wood, paper, oil, clothing, etc.). May be ignited by heat, sparks or flames.

Safety Profile

Moderately toxic by intraperitoneal route. Combustible when exposed to heat, flames, or reducing agents. To fight fire, use water spray, foam, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes. Used in the polymerization of styrene and in cross-linking of various grades of polyethylene. See also PEROXIDES, ORGANIC.