tert-Butyl peroxypivalate Property

Melting point:

-17°C

Boiling point:

245.22°C (rough estimate)

Density 

0.854

vapor pressure 

4.02hPa at 38℃

refractive index 

1.410

Flash point:

68~71℃

Water Solubility 

insoluble

LogP

3.17 at 25℃

EPA Substance Registry System

Propaneperoxoic acid, 2,2-dimethyl-, 1,1-dimethylethyl ester (927-07-1)

Safety

RIDADR 

UN 2110

HazardClass 

5.2

PackingGroup 

II

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H242Heating may cause a fire

H304May be fatal if swallowed and enters airways

H315Causes skin irritation

H317May cause an allergic skin reaction

H335May cause respiratory irritation

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.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P272Contaminated work clothing should not be allowed out of the workplace.

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

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

P321Specific treatment (see … on this label).

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P333+P313IF SKIN irritation or rash occurs: Get medical advice/attention.

P362Take off contaminated clothing and wash before reuse.

P363Wash contaminated clothing before reuse.

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

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

P411Store at temperatures not exceeding … oC/…oF.

P420Store away from other materials.

P501Dispose of contents/container to..…

tert-Butyl peroxypivalate Chemical Properties,Usage,Production

Chemical Properties

Colorless liquid. Insoluble in water and ethylene glycol; soluble in most organic solvents.

Uses

Polymerization initiator.

Uses

t-Butyl peroxypivalate is used as a polymerizationinitiator to make acrylic polymers.

General Description

Colorless liquid that solidifies below -19°C Decomposes at 70°C. Flammable and a dangerous fire risk. Heating may cause explosion. Used as a polymerization initiator.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

tert-Butyl peroxypivalate explodes with great violence when rapidly heated to a critical temperature. Shock sensitive and detonable when pure [Bretherick 1979 p. 602].

Hazard

(Solution) Flammable, dangerous fire risk. Oxidizing agent. May explode on heating.

Health Hazard

t-Butyl peroxypivalate is a mild irritant to theeyes and skin with low toxicity.
LD₅₀ value, oral (rats): 4300 mg/kg.

Fire Hazard

The pure compound is dangerously shock sensitive. It is sold commercially up to 75% maximum concentration in mineral spirits. This solution is reactive, oxidizing, and combustible; flash point (open cup) 68°C (154°F). Its burning is vigorous, which is difficult to extinguish (NFPA 1997). It is sensitive to shock and heat; self-accelerating decomposition temperature 29°C (84°F); decomposition of the 75% concentrated solution may be explosive when heated. It may form flammable decomposition products, which can enhance the fire hazard. It may ignite and/or explode in contact with accelerators, acids, and combustible and readily oxidizable substances.
Fight fires from a safe and explosionresistant location. Use water from a sprinkler or a fog nozzle. Since it decomposes little above room temperature, giving off flammable volatile products, care should be taken for proper venting and to keep the containers and vicinity cool.

Safety Profile

Mildly toxic by ingestion. Moderately flammable by heat, flame (sparks), oxidizers. Can explode on heating. To fight fire, use water, fog, mist, alcohol foam, dry chemical. When heated to decomposition it emits acrid smoke and fumes. See also PEROXIDES, ORGANIC

storage

t-Butyl peroxypivalate is stored in a deepfreezebox with a free-opening cover at 18to -1°C (0-30°F) in a well-ventilated andunheated area, isolated from other chemicals.It is shipped in 5-gallon polyethylene containerswith vented caps and outer fiberboardcovering, maintained at -18 to -1°C (-0.4to 30.2°F).

Waste Disposal

Absorb the spilled material with vermiculiteor other noncombustible material.Then sweep up and place in a plastic containerfor disposal. It is burned in a shallowpit in a remote area by igniting with a longtorch.