tert-Butyl peroxyisobutyrate Property

Boiling point:

226.12°C (rough estimate)

Density 

1.0227 (rough estimate)

vapor pressure 

5.04hPa at 37℃

refractive index 

1.4370 (estimate)

Water Solubility 

3.96g/L at 20℃

LogP

2.68 at 25℃

CAS DataBase Reference

109-13-7

EPA Substance Registry System

Propaneperoxoic acid, 2-methyl-, 1,1-dimethylethyl ester (109-13-7)

Safety

RIDADR 

UN 2142/2562

HazardClass 

5.2

PackingGroup 

II

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H241Heating may cause a fire or explosion

H304May be fatal if swallowed and enters airways

H331Toxic if inhaled

H411Toxic to aquatic life with long lasting effects

Precautionary statements

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

P220Keep/Store away from clothing/…/combustible materials.

P234Keep only in original container.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P271Use only outdoors or in a well-ventilated area.

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

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P311Call a POISON CENTER or doctor/physician.

P321Specific treatment (see … on this label).

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

P370+P380+P375in case of fire: Evacuate area. Fight fire remotely due to the risk of explosion.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P403+P235Store in a well-ventilated place. Keep cool.

P405Store locked up.

P411Store at temperatures not exceeding … oC/…oF.

P420Store away from other materials.

P501Dispose of contents/container to..…

tert-Butyl peroxyisobutyrate Chemical Properties,Usage,Production

Uses

Polymerization catalyst.

General Description

tert-Butyl peroxyisobutyrate is particularly sensitive to temperature rises. Above a given "Control Temperature" they decompose violently. tert-Butyl peroxyisobutyrate is generally stored or transported in a solvent slurry. Solvent is usually benzene. Responders must regard hazards of the peroxide as well as the benzene solvent.

Reactivity Profile

TERT-BUTYL PEROXYISOBUTYRATE explodes with great violence when rapidly heated to a critical temperature; pure form is shock sensitive and detonable [Bretherick 1979 p. 602].

Hazard

Flammable, dangerous fire risk. Oxidizing agent.

Flammability and Explosibility

Not classified

Purification Methods

After diluting 90mL of the material with 120mL of pet ether, the mixture is cooled to 5o and shaken twice with 90mL portions of 5% NaOH solution (also at 5o). The non-aqueous layer, after washing once with cold water, is dried at 0o with a mixture of anhydrous MgSO4 and MgCO3 containing ca 40% MgO. After filtering, this material is passed, twice, through a column of silica gel at 0o (to remove tert-butyl hydroperoxide). The solution is then evaporated at 0o/0.5-1mm to remove the solvent, and the residue is recrystallised several times from pet ether at -60o, then subjected to high vacuum to remove traces of solvent [Milos & Golubovic J Am Chem Soc 80 5994 1958]. Handle with adequate protection due to possible EXPLOSIVE nature.