2,5-Di(tert-butylperoxy)-2,5-dimethyl-3-hexyne Property

Melting point:

88 °C (SADT)(lit.)

Boiling point:

348.77°C (rough estimate)

Density 

1.26 g/mL at 25 °C(lit.)

vapor pressure 

0.011Pa at 20℃

refractive index 

1.4340 (estimate)

Flash point:

188 °F

storage temp. 

2-8°C

form 

Solid

color 

White to Off-White

Water Solubility 

2.2mg/L at 20℃

LogP

6.71 at 25℃

CAS DataBase Reference

1068-27-5(CAS DataBase Reference)

EPA Substance Registry System

Peroxide, 1,1'-(1,1,4,4-tetramethyl-2-butyne-1,4-diyl)bis[2-(1,1-dimethylethyl) (1068-27-5)

Safety

Hazard Codes 

O,Xi,Xn,F,E

Risk Statements 

8-38-36/37/38-7-41-37/38-20-11-36/38-2

Safety Statements 

7-17-36/37/39-36-26-3/7-14-47-35

RIDADR 

UN 3106 5.2

WGK Germany 

3

RTECS 

MQ9750000

HazardClass 

5.2

PackingGroup 

II

HS Code 

29096000

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H242Heating may cause a fire

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

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

P235Keep cool.

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

P302+P352IF ON SKIN: wash with plenty of soap and water.

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

P410Protect from sunlight.

2,5-Di(tert-butylperoxy)-2,5-dimethyl-3-hexyne Chemical Properties,Usage,Production

Chemical Properties

This peroxide is a yellow liquid used in the cross-linking of various polyolefins. Its half-life in benzene is 10 h at 267°F (130°C) .

Uses

Free radical polymerization initiator.

General Description

2,5-Di(tert-butylperoxy)-2,5-dimethyl-3-hexyne is particularly sensitive to temperature rises and contamination. Above a given "Control Temperature" they decompose violently. 2,5-Di(tert-butylperoxy)-2,5-dimethyl-3-hexyne is generally stored or transported as a mixture, with an inert solid.

Reactivity Profile

Peroxides, such as 2,5-BIS(TERT-BUTYLPEROXY)-2,5-DIMETHYL-3-HEXYNE, 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.

Flammability and Explosibility

Not classified