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

Item	Content
Product Name	Initiator LQ-BPDH
Chemical Name	2,5-Bis(tert-butyl peroxide)-2,5-dimethylhexane
Molecular Formula	C₁₆H₃₄O₄
Molecular Weight	290.44
Theoretical Active Oxygen Content	11.02%
CAS No.	78-63-7
UN No.	3105
IMO/IMDG	5225
ADR Classification	5.2 (Organic Peroxide Liquid)
Classification	Type 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-Life	Temperature
0.1 hour	156°C
1 hour	134°C
10 hours	115°C

Thermal Stability Data

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

Technical Standards

Item	Content
Appearance	Transparent liquid
Active Oxygen	10.1% min
Color	50 Pt-Co max
Specific Gravity (20°C)	0.870 kg/m³
Refractive Index (20°C)	1.422
Peroxide Content	0.3% max (tert-butyl peroxide and 2,5-dimethyl-2,5-tert-butyl peroxide)

Usage

Application	Details
Polymer Crosslinking Agent	Suitable 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 Rubber	Ideal for vulcanizing silicone rubber, as well as other rubber types, providing high tensile strength and hardness.
Polypropylene Degradation Agent	Effective 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 Polyester	Widely used for curing unsaturated polyester resins.

Packaging and Transportation

Item	Details
Standard Packaging	5 kg, 15 kg, 20 kg (Polyethylene packaging). Custom sizes available.
Transportation Regulations	UN No. 3105, Class 5.2 Organic Peroxide Liquid, IMDG 5225.

Storage Instructions

Precaution	Description
Storage Conditions	Store in a cool, ventilated space. Temperature should not exceed 30°C.
Separation from Hazards	Keep away from fire, heat sources, acids, reducing agents, flammable substances, and combustibles.
Storage Facilities	Use explosion-proof lighting and ventilation in storage rooms. Switches should be located outside the storage area.
Handling	Handle with care to avoid damage to containers, prevent impact and vibration, and use personal protective equipment.

Shelf Life

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

Safety Testing

Test	Result
Hammer Sensitivity	>60 cm
Friction Sensitivity	>700 kg/cm²
Pressure Vessel Test	1.8 mm
SADT	80°C
Alarm Temperature	75°C

Disposal Methods

Disposal Method	Description
Diluted Incineration	Dilute the product with inexpensive solvents (e.g., alcohol) to less than 10%, and incinerate under controlled conditions.
Hydrolysis	Use 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 Disposal	For large quantities, notify the manufacturer for specialized disposal handling.

Spill Handling

Spill Handling	Description
Eye Contact	Flush eyes with water for 15 minutes, seek medical attention.
Skin Contact	Wash thoroughly with soap and water, seek medical attention.
Spill on Ground	Absorb with inert materials (sand, vermiculite), then collect with non-sparking tools and dispose of properly.

Fire Protection

Fire Protection	Description
Small Fire Handling	Use foam or dry powder extinguishers for small fires.
Large Fire Handling	Evacuate to a safe distance, use water cannon for fire fighting, and immediately notify fire services for further support.