2,5-Di-tert-butylperoxy-2,5-dimethylhexane BPDH 78-63-7


Trade name: Initiator BPDH

English name: 2,5-Bis(tert-butyl peroxide)-2,5-dimethyhexane

Chemical name: 2,5-Di-tert-butyl peroxy-2,5-dimethylhexane

Molecular Formula: C16 H34 O4

Molecular weight: 290.44

Theoretical active oxygen content: 11.02%

CAS No.: 78-63-7

UN No. 3105

IMO/IMDG 5225 Level: 5.2

Road transport (ARD): 5.2 5b

Railroad transportation (RID): 5.2 5b

Sea freight (IMDG): 5.2 - 01 Packing Group II, Class C liquid peroxides.

Properties: This product is a colorless transparent liquid, can be diluted with alkane, odorless mineral oil, isododecane and so on. Or it can be diluted with the solvent specified by the customer. It can also be diluted with inorganic compounds or polypropylene powder.

Dilution, insoluble in water, soluble in most organic solvents, specific gravity (200C) 0.870, now provides 90%, 50%, 30% three specifications of products.

Main decomposition products: tert-butanol, 2,5-dimethyl-2,5-hexanediol, isobutene, methane, acetone, etc.

Security indicators:


0.1 hours: 156°C

1 hour: 134°C

10 hours: 115°C

Thermal stability data:

Self-accelerated decomposition temperature (SADT): 80°C

Critical temperature (Tem): 75°C

Storage temperature (Tsmax): 10/40 °C

Activation energy E (KJ/mol): 155.49

A=1.68E+16 (S-1)

FDA approved for use in reusable rubber products.

Route of invasion: inhalation, ingestion, absorption through skin


Oral LD50: >3200mg/kg (rat oral)

Dermal LD50: >4.1mg/kg (rabbit)

Acute intraperitoneal toxicity LD50: 1700mg/kg (mouse)

Health Hazard: This product is irritating to eyes, skin and mucous membranes and can cause dermatitis.

Technical standards:

Appearance: 92% min                     

Effective oxygen: 10.1 % min                 

Chromaticity: 50 Pt-Co max

Specific gravity (20 0C): 870KG/M3

Refraction (20 0C): 1.422

Content of tert-butyl hydroperoxide and 2,5-dimethyl-2,5-di-tert-butyl hydroperoxide: 0.3%max


1. Polymer crosslinking agent: It is an organic peroxide crosslinking agent which can be widely applied to a variety of polymers, especially suitable for polyethylene (LDPE, HDPE), ethylene/vinyl acetate copolymer polymerization.

Crosslinking agent, crosslinking temperature of 1700C or more, in 1400C or less does not crosslinking. The dosage is 0.5%-3% (W/W), in some materials that are not easy to cross-linking its dosage is usually


2. It is a high temperature vulcanizing agent for vinyl silicone rubber: it is also an excellent vulcanizing agent for other kinds of rubber, and the rubber vulcanized with this product has outstanding advantages such as high tensile strength and high hardness.

3. Excellent degradation agent for polypropylene degradation: Degradation temperature is 200-2200C, dosage is 0.01-0.1%. It can be used to make rheological polypropylene with low molecular weight and narrow molecular weight distribution, and can be used for

It is an important initiator for high-speed spinning materials, coating materials, film materials and cast plastics, and is the preferred raw material for the production of cooling masterbatch.

4. It is a high temperature curing agent for unsaturated polyester.

Packaging and Transportation:

Our peroxide products are packed in different packages of 5kg, 15kg and 20kg according to international standards, and can also be supplied according to customers' requirements, all of which are packed with PE materials.

Storage Precautions.

1. Store in a cool and ventilated space with a temperature not exceeding 300C.

2. Keep away from fire and heat source. It should be stored separately from acids, reducing agents, flammables, combustibles and reducing agents.

3. The lighting and ventilation of the storage room and other facilities are of explosion-proof type, and the switch is located outdoors.

4. When handling, it should be put down carefully and gently to prevent the damage of package and container, prohibit impact and oscillation, and pay attention to personal protection in the packing and handling operation.

Shelf life:

In strict accordance with the manufacturer's prompt conditions of storage, transportation. The quality of the product can be guaranteed within three months.

Safety tests:

Drop sensibility: greater than 60 cm

Friction sensibility: more than 700 kg/cm2

Pressure vessel test: 1.8mm

Self-accelerating decomposition temperature (SADT): 800C

Alarm temperature: 750C

Method of destruction.

1. Dilution and incineration: the products to be destroyed are diluted with cheap solvents, such as sprinkler, waste oil, etc. to below 10% and then incinerated under controlled conditions.

2. Hydrolysis: Prepare methanol or isopropanol solution of caustic soda as 20%-30%, then add the product to be destroyed into caustic soda solution about 10 times of its weight, stirring while adding until the hydrolysis is complete.

3. A large number of products destroyed users must notify the manufacturer to send specialized personnel to avoid accidents.

Spill handling:

1, the product accidentally into the eyes, should immediately pull open the eyelids, for flowing water rinse for 15 minutes, seek medical attention.

2. If accidentally splashed on the skin, immediately rinse thoroughly with soapy water and water. Seek medical attention.

3. If the product spills or leaks onto the ground, it should be absorbed by sand, vermiculite or other inert materials, then collected in a plastic bucket with a non-sparking tool and transported to the waste disposal site. And use

Water rinses contaminated ground.

Fire protection:

1, the product may be due to heat and violent decomposition, will be violent fire, a small amount of product small fire should be quickly extinguished with foam or dry powder fire extinguisher.

2, the fire should be quickly withdrawn to a safe distance away and put out with a water gun, notify the fire department to deal with.

We offer products for sale in China (in compliance withRegulations on the Administration of Internet Sales of Hazardous Chemicals) and some of the products of the global export services, can provide including hazardous chemicals packaging, "outbound cargo packaging performance inspection certificate", "commodity inspection list" and other related export procedures.
We have experience in exporting hazardous chemicals, including Class 5.2 Dangerous Goods with Cold Chain Transportation Products, Class 3 Dangerous Goods and Class 9 Dangerous Goods, etc., and have exported to the United States of America, Russia, Turkey, India, Ukraine and other countries.

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