LQ-BPDH 2,5-Bis(tert-butyl peroxide)-2,5-dimethylhexane 78-63-7

ItemContent
Product NameInitiator LQ-BPDH
Chemical Name2,5-Bis(tert-butyl peroxide)-2,5-dimethylhexane
Molecular FormulaC₁₆H₃₄O₄
Molecular Weight290.44
Theoretical Active Oxygen Content11.02%
CAS No.78-63-7
UN No.3105
IMO/IMDG5225
ADR Classification5.2 (Organic Peroxide Liquid)
ClassificationType C Organic Peroxide Liquid, Class 5.2 (Dangerous goods)

Major Decomposition Products

Decomposition Product
Tert-butyl alcohol
2,5-Dimethyl-2,5-hexanediol
Isobutene
Methane
Acetone

Safety Indicators

Half-LifeTemperature
0.1 hour156°C
1 hour134°C
10 hours115°C

Thermal Stability Data

Thermal Stability ParameterTemperature
Self-accelerating Decomposition Temperature (SADT)80°C
Critical Temperature (Tem)75°C
Storage Temperature (Tsmax)10/40°C

Technical Standards

ItemContent
AppearanceTransparent liquid
Active Oxygen10.1% min
Color50 Pt-Co max
Specific Gravity (20°C)0.870 kg/m³
Refractive Index (20°C)1.422
Peroxide Content0.3% max (tert-butyl peroxide and 2,5-dimethyl-2,5-tert-butyl peroxide)

Usage

ApplicationDetails
Polymer Crosslinking AgentSuitable for crosslinking of various polymers, especially polyethylene (LDPE, HDPE) and ethylene/vinyl acetate copolymers. Crosslinking temperature >170°C, no crosslinking below 140°C. Dosage: 0.5-3% (W/W), higher for materials that are hard to crosslink.
High-Temperature Vulcanizing Agent for Silicone RubberIdeal for vulcanizing silicone rubber, as well as other rubber types, providing high tensile strength and hardness.
Polypropylene Degradation AgentEffective for polypropylene degradation, creating low molecular weight, narrow molecular distribution polypropylene. Used in production of fibers, coatings, films, and cast materials.
High-Temperature Curing Agent for Unsaturated PolyesterWidely used for curing unsaturated polyester resins.

Packaging and Transportation

ItemDetails
Standard Packaging5 kg, 15 kg, 20 kg (Polyethylene packaging). Custom sizes available.
Transportation RegulationsUN No. 3105, Class 5.2 Organic Peroxide Liquid, IMDG 5225.

Storage Instructions

PrecautionDescription
Storage ConditionsStore in a cool, ventilated space. Temperature should not exceed 30°C.
Separation from HazardsKeep away from fire, heat sources, acids, reducing agents, flammable substances, and combustibles.
Storage FacilitiesUse explosion-proof lighting and ventilation in storage rooms. Switches should be located outside the storage area.
HandlingHandle with care to avoid damage to containers, prevent impact and vibration, and use personal protective equipment.

Shelf Life

Shelf LifeDetails
Shelf Life (Storage Conditions)3 months, provided conditions are strictly adhered to.

Safety Testing

TestResult
Hammer Sensitivity>60 cm
Friction Sensitivity>700 kg/cm²
Pressure Vessel Test1.8 mm
SADT80°C
Alarm Temperature75°C

Disposal Methods

Disposal MethodDescription
Diluted IncinerationDilute the product with inexpensive solvents (e.g., alcohol) to less than 10%, and incinerate under controlled conditions.
HydrolysisUse a solution of caustic soda in methanol or isopropanol (20%-30%) to hydrolyze, adding the product to 10 times its weight of caustic solution, stirring until complete hydrolysis.
Large-Scale DisposalFor large quantities, notify the manufacturer for specialized disposal handling.

Spill Handling

Spill HandlingDescription
Eye ContactFlush eyes with water for 15 minutes, seek medical attention.
Skin ContactWash thoroughly with soap and water, seek medical attention.
Spill on GroundAbsorb with inert materials (sand, vermiculite), then collect with non-sparking tools and dispose of properly.

Fire Protection

Fire ProtectionDescription
Small Fire HandlingUse foam or dry powder extinguishers for small fires.
Large Fire HandlingEvacuate to a safe distance, use water cannon for fire fighting, and immediately notify fire services for further support.

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