(Di)Benzoyl peroxide 75%
(Di)Benzoyl peroxide 75%. CAS Number: 94-36-0. EINECS: 202-327-6.
Product Appearance & Packaging
Product Specifications
| Product Name | (Di)Benzoyl peroxide 75% |
|---|---|
| Chemical Name | (Di)Benzoyl peroxide 75% |
| CAS Number | 94-36-0 |
| EINECS/ELINCS No. | 202-327-6 |
| Molecular Weight | 242.2 g/mol |
| Active Oxygen Content | 4.88-5.02% |
| Appearance | White powder |
| Assay | 74.0-76.0% |
| UN Classification | Organic peroxide type C; solid, Division 5.2; UN 3104; PG II |
| Packaging | 25 kg |
Industrial Applications
Initiator (powder formulation with 75% benzoyl peroxide and 25% water) for curing unsaturated polyester, vinyl ester and acrylic thermoset resins at ambient or slightly elevated temperatures.
Half-Life Data
Half-life (t½) data for (Di)Benzoyl peroxide 75% measured in chlorobenzene:
| Half-Life (t½) | Temperature |
|---|---|
| 0.1 hr | 113°C (235°F) |
| 1 hr | 91°C (196°F) |
| 10 hr | 71°C (160°F) |
Kinetic formulas:
kd = A·e−Ea/RT | t½ = (ln2) / kd
Ea = 122.35 kJ/mole | A = 6.94E+13 s⁻¹ | R = 8.3142 J/mole·K | T = (273.15+°C) K
Thermal Stability
Organic peroxides are thermally unstable substances which may undergo self-accelerating decomposition. The Self Accelerating Decomposition Temperature (SADT) is the lowest temperature at which self-accelerating decomposition may occur.
Recommended Storage
Note: When stored according to these recommended conditions, (Di)Benzoyl peroxide 75% will remain within specifications for a period of at least 3 months after delivery.
Major Decomposition Products
In the event of thermal decomposition, (Di)Benzoyl peroxide 75% produces the following major decomposition products: