Perodox® 127 - Tert-Amyl peroxybenzoate

Tert-Amyl peroxybenzoate (CAS 4511-39-1) is an organic peroxide compound used primarily as a polymerization initiator and curing agent in various industrial applications

The molecular formula is C12H16O3

The molecular weight is 208.25 g/mol

It is used as a polymerization initiator for styrene, ethylene, and acrylic monomers, as a curing agent for unsaturated polyesters, and as a vulcanizing agent for rubber

The predicted boiling point is 298.9±9.0 °C

The flash point is 43°C

The density is 1.01 g/mL at 25°C

The refractive index is n20/D 1.501

The theoretical active oxygen content is 7.68%

Commercial products typically have a purity of ≥98%

The UN number is 3105

It belongs to Packing Group II

It is classified as Hazard Class 5.2 (Organic Peroxides)

The GHS hazard statements are H242 (Heating may cause a fire) and H226 (Flammable liquid and vapor)

Store in a cool, well-ventilated place away from heat and incompatible materials. Storage temperature should not exceed 30°C

The SADT is 60°C

The half-life is approximately 10 hours at 99°C

A 1-hour half-life occurs at 118°C

Yes, it is commonly used for styrene polymerization in the temperature range of 100-135°C

No, it is insoluble in water but soluble in most organic solvents

Main decomposition products include tert-butanol, benzoic acid, methane, acetone, ethane, and benzene

Wear protective gloves, clothing, eye protection, and face protection. Use in well-ventilated areas

There is no specific information about food-contact applications in the available sources. Appropriate regulatory approvals should be verified before such use.

When stored under recommended conditions, the product quality can be guaranteed for six months

The activation energy is 147.2 kJ/mol

They have different alkyl groups (amyl vs butyl), resulting in different decomposition temperatures and reactivity profiles. Tert-Amyl peroxybenzoate has a slightly higher molecular weight and different application temperature ranges.

The InChIKey is RFSCGDQQLKVJEJ-UHFFFAOYSA-N

The SMILES notation is C1(C(OOC(C)(C)CC)=O)=CC=CC=C1

The EINECS number is 224-831-5

Synonyms include Luperox TAP, tert-Pentyl perbenzoate, TAPB, and Perbenzoic acid tert-amyl ester

Yes, it can be used in acrylic ester polymerization as an alternative to azo initiators

Specific concentration data is not provided in the available sources, but it is typically used in combination with other initiators

It appears as a clear yellow liquid

The decomposition temperature is 76-77°C

Yes, it is widely used as a high-temperature curing agent for unsaturated polyesters

Avoid heat, sparks, and open flames. Use in well-ventilated areas with appropriate personal protective equipment

Use foam, dry chemical, or CO2 extinguishers. Water may be used to cool containers but may not effectively extinguish the fire

Flush with water for at least 15 minutes and seek medical attention

Incompatible materials include strong acids, strong bases, reducing agents, and heavy metal compounds

Standard packaging is 25kg polyethylene drums, though other sizes may be available

Yes, it is often used with other initiators like dibenzoyl peroxide or tert-butyl peroxy-2-ethylhexanoate for improved efficiency

Specific oxygen balance data is not provided in the available sources.

Vapor pressure data is not provided in the available sources for this compound.

It is soluble in most organic solvents including ethers, ketones, and esters

Dispose of in accordance with local, state, and federal regulations

pH information is not provided in the available sources as it is an organic compound not typically characterized by pH.

Viscosity data is not provided in the available sources.

Quality control typically includes testing for purity, active oxygen content, TBHP content, and hydrolyzable chlorides

Handle at temperatures below 30°C to minimize decomposition risks

Specific heat of decomposition data is not provided in the available sources.