Description and features
Enox PMBP, di-4-methylbenzoyl-peroxide is a white paste in silicon oil which has C16H14O4 as chemical formula. This diacyl peroxide is mainly used for the crosslinking of silicone rubbers.
Di(4-methylbenzoyl)peroxide is also known as p-Toluoyl peroxide and 4-methylbenzoyl peroxide
Availability
Europe: Enox PMBP is in stock in our local warehouses. Our lead time is about one week if delivered in 20 KG PE drums.
We can also serve Canada, South America, South Africa, and other markets. Please contact our sales department for more details.
This substance (CAS: 895-85-2) has been registered (FULL) under REACH (EC) 1907/2006.
Product Identification
| CAS number | 895-85-2 |
| EC number | 407-950-9 |
| HS code | 2916 39 00 |
Half-life data
| Activation energy | 30.0 kcal/mol |
| 10 hr. half-life temp | 70 °C |
| 1 hr. half-life temp | 89 °C |
| 1 min. half-life temp | 130 °C |
Specification
| Appearance | White paste |
| Assay | 49.00 – 52.00 % |
| Active oxygen content | 2.90 – 3.08 % |
| Free chlorine | ≤0..05 % |
| Acidity as 4-methylbenzoic acid | ≤0.50 % |
| Volatile matter | ≤1.50 % |
Application
Enox PMBP primarily crosslinks silicone rubbers, allowing compounds to cure at atmospheric pressure in continuous systems using hot air or IR vulcanization. Additionally, the paste prevents scorching at temperatures below 80 ºC and facilitates easier mixing of the substance.
Packaging
Available packaging: 20 KG PE drums.
Special packaging is available on request.
Storage
Store di-4-methylbenzoyl-peroxide below 25ºC in a cool, dry, and well-ventilated area, ensuring compliance with legal requirements. Additionally, keep Enox PMBP away from heat sources and avoid contact with acids, alkalis, heavy metal compounds, and reducing agents. Furthermore, note that the Self Accelerating Decomposition Temperature (SADT) in the original packaging is 80ºC.
MSDS
A Material Safety Data Sheet (MSDS) is available for Enox PMBP and all other products supplied by Vesta Chemicals BV.
An MSDS outlines the hazards of a product and explains how to handle, use, and store the product safely. Besides it provides important regulatory and emergency response information for the purchased product.
Molecular and structural information
| Molecular formula | C16H14O4 |
| Molecular weight | 270.30 g/mol |
| Smiles notation | CC1=CC=C(C=C1)C(=O)OOC(=O)C2=CC=C(C=C2)C |
| InChi key | AGKBXKFWMQLFGZ-UHFFFAOYSA-N |
| Structural formula |  |
Physicochemical information
| Boiling point | Decomposes before boiling |
| Bulk density | 1.22 kg/m3 @ 20 ºC |
| Flash point | Decomposes before flash point |
| Melting point | 101 325 Pa @ 134 ºC |
| Partition coefficient (log Pow) | 4.70 @ 20 ºC |
| SADT | 80 ºC |
| Solubility in water | 0.043 mg/l (20 ºC) |
| Vapor pressure | 0.01 Pa @ 25 ºC |