Perodox L
Full name:(Di)Benzoyl Peroxide
Molecular formula:C14H10O4
Molecular weight:242.23
CAS number:94-36-0
Abbreviation and alias:BPO, Benzoyl Superoxide, Dibenzoyl Peroxide
Physical properties:
White crystal, mp 103~106°C (decomposition). Slightly soluble in water and methanol, soluble in ethanol, benzene, chloroform, ether, and carbon disulfide.
Preparation and Products: Available from domestic reagent companies.
Cautions:It can cause explosive decomposition when exposed to heat, friction and vibration, and spontaneous combustion occurs at 79 °C. All experiments with dibenzoyl peroxide must be performed in a fume hood.
Purpose and application:
There are many purpsoes and applications for (Di)Benzoyl Peroxide.
- BPO 50% pastes form can be a monofunctional peroxide which is used for the crosslinking of silicone rubber. Benzoyl peroxide 50% paste form without phthalates, used for curing unsaturated polyester resin at ambient and high temperatures. So does 47% non-phthalate plasticizer with the solid form.
- 45% peroxide formulation with a phthalate-free carrier is used for the curing of unsaturated polyester and (meth)acrylic resins at ambient and elevated temperature.
- Also it is for curing unsaturated polyester resins and (meth)acrylic resins at ambient and elevated temperatures, performing an excellent solubility in standard thermoset curing applications.
- BPO75% is an initiator for the (co) polymerization of styrene, acrylonitrile, vinyl acetate, and (methyl) acrylate. Unsaturated polyester resin curing agent.s an initiator for (co)polymerization of styrene, acrylonitrile, vinylacetate, (meth)acrylates. Curing agent for unsaturated polyester resins.
- BPO USP grade is a free-flowing, granular di benzoyl peroxide suitable for use in a variety of pharmaceutical applications, including anti-acne creams, facial cleansers, body washes, and shampoos. Typically granular powders have a BPO content of at least 78%.
- BPO 30%-35% suspension form is an easily pumpable micronized BPO suspension form of dibenzoyl peroxide suitable for bleaching whey, cheese, oils and other food products.
- BPO 20% powder form is a special low-concentration BPO formulation for curing mine bolts and chemical anchors.
Also BPO can be used for chemicals synthesis and other purposes.
In a word, BPO with different content and forms could be used for the following applications:
- Acrylic Road marking & flooring
- Acrylics
- API
- Automotive putty
- Bleaching
- Chemical anchors & mine bolts
- Continuous Laminating
- Engineered Stone
- Filament winding
- Food bleaching
- Gelcoats
- Hand lay-up & spray-up
- Marine
- Pharmaceutical
- Pharmaceutical and Fine Chemicals
- Polystyrene
- Pultrusion
- PVA
- Resin Transfer Molding
- Silicone rubber
- Thermoset
- Vinylesters
For functions it could be divided into:
- Bleaching Agent
- Crosslinking peroxide
- Curing agent
- Pharmaceutical Ingredient
- Polymerization initiator
For market segment, it would be for:
- Acrylics production
- Food and beverage
- Pharmaceutical industry
- Polymer crosslinking
- Polymer production
- Thermoset composites
BPO is an initiator of free radical reactions. The reactions it can trigger include: halogenation reaction of allyl and benzyl groups, free radical addition of carbon-carbon multiple bonds to form carbon-heteroatoms (Halogen, S, Si, Ge, P, N) bonds, C-H addition of intermolecular or intramolecular carbon-carbon multiple bonds, etc. It can also be used as a benzoate reagent for enols, enamines and other electron-rich systems, and can also be used to oxidize N, P, Si, S and Se compounds, or act as an oxidant in redox chain reactions involving transition metals. .
BPO will undergo a homolytic reaction of O-O bonds at 95 °C. The homolytic reaction can also occur under the conditions of light and transition metal catalysis.
BPO is often used as an initiator for halogenation reactions at the allyl and benzyl positions. In addition to reacting at the benzylic position of the benzene ring, halogens can also be introduced into the benzylic position of other aromatic heterocycles.
BPO can also be used as an initiator for the free radical addition reaction of unsaturated hydrocarbons and is widely used in the free radical polymerization of vinyl compounds (vinyl chloride, vinyl acetate, butadiene derivatives, styrene and acrylic monomers, etc.) Reactive synthetic plastics. BPO can also be used as an initiator to add hydrogen bromide to the double bond to obtain an anti-Markovnikov addition product.
Tertiary amines will be oxidized by BPO to amine oxides, and primary and secondary amines will be oxidized to benzoyloxyamines. BPO can react with aromatic hydrocarbons or heterocyclic aromatic hydrocarbons to form benzoates. For example, indole can react with BPO to obtain the corresponding benzoate products.
Secondary alcohols can also be oxidized to ketones by BPO under the catalysis of metal catalysts.
In cross-coupling reactions, BPO can be used as an additive to improve the yield of the reaction.
Under metal catalysis, BPO can also be used as a phenylation reagent for aromatic rings. Its reaction process: First, it cleaves in a free radical manner. Then, carbon dioxide is released to form phenyl radicals. Finally, the free radical is coordinated to the metal with a phenyl group in the ortho position of the directing group. In addition to 2-phenylpyridine substrate, other substrates can also be used, such as benzoquinoline and 8-methylquinoline.
