LQ-TAPB Tert-amyl peroxy benzoate 4511-39-1

Item	Content
Product Name	Initiator LQ-TAPB
Chemical Name	Tert-amyl peroxy benzoate
Molecular Formula	C₁₂H₁₆O₃
Molecular Weight	208.30
Theoretical Active Oxygen Content	7.68%
CAS No.	4511-39-1
UN No.	3103
Class	5.2, Type C Organic Peroxide Liquid

Properties

Property	Description
Appearance	Pale yellow transparent liquid
Boiling Point	124°C (760mmHg)
Decomposition Temperature	76-77°C
Solubility	Insoluble in water, soluble in most organic solvents
Specific Gravity (25°C)	1.036-1.045
Refractive Index (25°C)	1.495-1.500

Major Decomposition Products

Decomposition Product
Tert-butyl alcohol
Benzoic acid
Methane
Acetone
Ethane
Benzene

Safety Indicators

Half-Life	Temperature
0.1 hour	139°C
1 hour	118°C
10 hours	99°C

Thermal Stability Data

Thermal Stability Parameter	Temperature
Self-accelerating Decomposition Temperature (SADT)	60°C
Critical Temperature (Tem)	--
Storage Temperature (Tsmax)	--/20°C

Usage

Application	Details
Polyethylene Polymerization (LDPE)	Excellent medium-temperature initiator for high-pressure polyethylene polymerization. Often used in tubular or autoclave methods. Can be combined with other initiators for improved polymerization effects.
Styrene Suspension Polymerization	Common initiator for styrene and its copolymers when combined with BPO (Benzoyl Peroxide).
Acrylate Polymerization	Used to replace azo-based initiators, reducing toxicity in the resin. Can also be used for vinyl acetate polymerization.
Curing Unsaturated Polyester Resins	Preferred curing agent for high-temperature curing of unsaturated polyester resins, especially in SMC, BMC, and DMC molding.
Rubber Vulcanization	Effective vulcanizing agent for most types of rubber (excluding isobutylene rubber).
Fuel Additive	Increases the cetane number of diesel fuels.

Packaging and Transportation

Item	Details
Standard Packaging	25 kg polyethylene containers. Custom packaging available upon request.

Storage Instructions

Precaution	Description
Storage Conditions	Store in a cool, well-ventilated area. Maximum storage temperature: 30°C. Keep away from heat sources, flames, and incompatible materials such as acids, reducing agents, and flammable substances.
Storage Stability	Follow manufacturer guidelines for storage. Quality guaranteed for six months under proper conditions.
Handling Precautions	Handle carefully to avoid damage to packaging. Follow personal protection measures as outlined in the MSDS.

Fire Protection

Fire Protection	Description
Small Fire Handling	Use foam or dry powder extinguishers for small fires, followed by water to prevent re-ignition.
Large Fire Handling	For large fires, move to a safe distance and use large amounts of water to extinguish. Notify fire services for further action.