Benzoyl peroxide
Benzoyl peroxide (CAS: 94-36-0) is an organic compound with the formula (C₆H₅CO)₂O₂ and a molecular weight of 242.23 g/mol. This white powder functions as a potent oxidizing agent and is widely employed as an initiator and cross-linking agent in polymerisation processes. It is also utilised in various chemical syntheses and as a component in embedding media for microscopy, making it a versatile reagent in laboratory and industrial settings.
- IUPAC
- Dibenzoyl peroxide
- Synonyms
- Dibenzoyl peroxideBenzoic acid peroxidePeroxide, dibenzoyl
Polymerisation Initiator
Benzoyl peroxide serves as a crucial free-radical initiator in the polymerisation of monomers such as styrene, vinyl chloride, and acrylates. Its controlled decomposition at moderate temperatures generates radicals that initiate chain growth, leading to the formation of polymers used in plastics and resins.
Curing and Cross-linking Agent
In the production of thermosetting resins and elastomers, benzoyl peroxide acts as a curing agent and cross-linker. It promotes the formation of a three-dimensional network structure, enhancing the mechanical properties and thermal stability of the final material.
Chemical Synthesis
As a strong oxidizing agent, benzoyl peroxide is used in various organic synthesis reactions. It can facilitate halogenation, oxidation of aldehydes, and other transformations requiring a controlled supply of reactive oxygen species.
Embedding and Mounting Media
Benzoyl peroxide finds application in the preparation of samples for microscopy. It is used in certain embedding media to facilitate the hardening process, ensuring sample integrity during sectioning and examination.
| Molecular weight | 242.23 |
|---|---|
| Linear formula | (C6H5CO)2O2 |
| Assay | ≥98.0% dry basis |
| Grade | purum |
| Density | 1.16 g/mL at 25 °C(lit.) |
| Concentration | 40 wt. % in dibutyl phthalate |
| Autoignition temp | 176 °F |
| Melting point | 105 °C(lit.) |
| Storage temperature | 2-8°C |
| Contains / stabiliser | ~25% water as stabilizer |
| Application | Widely used initiator, curing agent, and cross-linking agent in polymerization processes. |
Hazard statements
- H317May cause an allergic skin reaction
- H319Causes serious eye irritation
Precautionary statements
- P220Keep away from clothing and combustible materials
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P410Protect from sunlight
- P420Store separately
| Transport (UN / ADR) | UN 3104A1 5.2 |
|---|---|
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | E,Xi |
| Risk statements (R) | 3-7-36-43 |
| Safety statements (S) | 3/7-14-26-35-36/37/39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Quality | moistened with water |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Benzoyl peroxide used for?
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Benzoyl peroxide is primarily used as a polymerisation initiator, a curing agent for resins and elastomers, and in various chemical synthesis applications. It also finds use in embedding media for microscopy.
What is the CAS number and chemical formula for Benzoyl peroxide?
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The CAS number for Benzoyl peroxide is 94-36-0, and its linear formula is (C₆H₅CO)₂O₂.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Benzoyl peroxide in purum grade, with an assay of ≥98.0% on a dry basis. This product is moistened with water and contains approximately 25% water as a stabiliser. It is supplied as a 40 wt. % solution in dibutyl phthalate.
How should Benzoyl peroxide be handled safely?
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Benzoyl peroxide is a warning substance, classified under GHS07. It can cause skin irritation (H317) and serious eye irritation (H319). Handle with appropriate personal protective equipment (gloves, eye protection) and ensure adequate ventilation. Avoid contact with skin and eyes. Store in a cool place, away from heat and incompatible materials.
How is Benzoyl peroxide packed and shipped?
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Benzoyl peroxide (UN 3104) is shipped as a hazardous material (Class 5.2, Organic Peroxide). It is typically supplied as a stabilized solution, often in dibutyl phthalate and moistened with water to ensure safety during transport and storage. Storage is recommended at 2-8°C.
How can I request a quote or sample for Benzoyl peroxide?
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To request a quote or a sample of Benzoyl peroxide, please contact the Tech Serve Solutions sales team through our website or by phone. Our specialists will assist you with your specific requirements.
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