• Perodox® 127 - Tert-Amyl peroxybenzoate

    CAS: 4511-39-1

    Perodox® 127,Tert-Amyl peroxybenzoate is an organic peroxide compound widely used as a polymerization initiator and curing agent in various industrial applications.

    It is particularly valued for its balanced reactivity profile and effectiveness at moderate temperatures.

  • Product Overview

    Perodox® 127 Tert-Amyl peroxybenzoate (CAS 4511-39-1) is an organic peroxide compound widely used as a polymerization initiator and curing agent in various industrial applications. It is particularly valued for its balanced reactivity profile and effectiveness at moderate temperatures.

    CAS Number:4511-39-1

    TSCA Status:Listed on inventory

    EINECS/ELINCS No.:224-831-5

    Molecular Weight:208.25 g/mol

  • Tert-Amyl peroxybenzoate Applications

    Perodox® 127 Tert-Amyl peroxybenzoate serves as a key initiator in various polymerization processes

    and finds applications across multiple industries due to its favorable decomposition characteristics.

    Polymerization Initiator

    Used for (co)polymerization of styrene in the temperature range of 100-135°C. Combinations with other peroxides reduce residual monomer content and increase reactor efficiency. Often used with more active initiators like dibenzoyl peroxide or tert-butyl peroxy-2-ethylhexanoate

    High-Pressure Polyethylene (LDPE)

    Functions as an excellent medium-temperature initiator for LDPE production, particularly in tubular or autoclave processes. Often used in combination with other initiators like tert-butyl peroxy pivalate (PV) or tert-butyl peroxy-2-ethylhexanoate (OT) for optimal results

    Unsaturated Polyester Resins

    Acts as a high-temperature curing agent for unsaturated polyesters used in fiberglass reinforced plastics (SMC, BMC, DMC), coatings, and adhesives. Provides ideal curing effects for molding and pultrusion processes

    Acrylic Polymerization

    Used in acrylic ester polymerization processes as an alternative to azo initiators, reducing resin toxicity. Also applicable in vinyl acetate polymerization

    Rubber Industry

    Functions as an effective vulcanizing agent for most rubbers (excluding isobutylene-based rubbers)

    Fuel Additive

    When added to petroleum products, it significantly increases cetane number, improving combustion characteristics.

  • Tert-Amyl peroxybenzoate Technical Data

    Comprehensive technical specifications and performance characteristics of Perodox® 127

    Physical and Chemical Properties

    Molecular Formula:C12H16O3

    Molecular Weight:208.25 g/mol

    Appearance:Clear yellow liquid

    Density:1.01 g/mL 25°C

    Boiling Point:298.9±9.0 °C

    Flash Point:43°C

    Refractive Index:n20/D 1.501 20°C

    Theoretical Active Oxygen:7.68%

    Decomposition Temperature:76-77°C

    Half-Life Data

    Half-Life Temperature

    0.1 hour 139°C

    1 hour 118°C

    10 hours 99°C

    Quality Specifications

    Purity:≥98%

    Active Oxygen Content:≥8.07%

    TBHP Content:≤1000 mg/kg

    Hydrolyzable Chlorides:≤50 mg/kg

    Safety Classification

    UN Transportation:UN 3105, Organic Peroxide Type C, Packing Group II

    GHS Hazard Statements:H242-H226 (May cause fire; Flammable liquid and vapor)

    Risk Phrases:R7, R10, R36/37/38 (May cause fire; Flammable; Irritating to eyes, respiratory system and skin)

  • Safety & Storage

    Proper handling and storage procedures for Perodox® 127

    Hazard Identification

    GHS Classification: Oxidizing liquids, Category 2; Skin irritation, Category 2; Specific target organ toxicity - single exposure, Category 3

    Hazard Statements:

    H242: Heating may cause a fire

    H226: Flammable liquid and vapor [1](@ref)

    Precautionary Statements:

    P210: Keep away from heat/sparks/open flames/hot surfaces

    P220: Keep/Store away from clothing/combustible materials

    P234: Keep only in original container

    P280: Wear protective gloves/protective clothing/eye protection/face protection

    P370+P378: In case of fire: Use appropriate extinguishing media

    P403+P235: Store in a well-ventilated place. Keep cool

    P411: Store at temperatures not exceeding ...°C/...°F

    P420: Store away from other materials

    P501: Dispose of contents/container in accordance with regulations

    Safe Handling Practices

    Handle in a well-ventilated place.

    Wear suitable protective clothing.

    Avoid contact with skin and eyes.

    Avoid formation of dust and aerosols.

    Use non-sparking tools.

    Prevent fire caused by electrostatic discharge

    Storage Conditions

    Store in a tightly closed container in a dry, cool, and well-ventilated place.

    Store apart from foodstuff containers or incompatible materials.

    Storage temperature should not exceed 30°C.

    Protect from sunlight

    Incompatible Materials

    Avoid contact with strong acids, strong bases, reducing agents, heavy metal compounds, accelerators, and other incompatible substances that may cause decomposition

    Spill and Leak Procedures

    Absorb with inert material and dispose of properly. Avoid sparks, flames, and heat sources during cleanup. Use non-sparking tools and equipment. Ensure adequate ventilation during cleanup

    Fire-Fighting Measures

    Use appropriate extinguishing media such as foam, dry chemical, or carbon dioxide. Water may be ineffective but can be used to cool containers. Fire may produce toxic fumes. firefighters should wear self-contained breathing apparatus

    First Aid Measures

    Inhalation: Move to fresh air. If breathing is difficult, give oxygen. Seek medical attention

    Skin Contact: Wash with plenty of soap and water. Remove contaminated clothing.

    Eye Contact: Flush with water for at least 15 minutes. Seek medical attention if irritation persists.

    Ingestion: Do NOT induce vomiting. Seek immediate medical attention

    Disposal Considerations

    Dispose of in accordance with all applicable federal, state, and local regulations. Contaminated packaging should be disposed of in the same manner as the product

  • Frequently Asked Questions

    Comprehensive questions and answers about Perodox® 127 applications, safety, and technical specifications

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