CAS No.
94-36-0
TSCA Status
listedon inventory
EINECS/ELINCS No.
202-327-6
Molecular weight
242.2
BPO75is an initiator (powder formulation with 75% benzoyl peroxide and 25% water)
used for curing unsaturated polyester, vinyl ester and acrylic thermoset resins
at ambient or slightly elevated temperatures. It is often used in conjuction
with tertiary amineaccelerators at ambient conditions. Typical uses include cast polymer, panels,
chemical anchors and mine bolts and RTM.
Applications
BPO75can be used for the market segments: polymer production, thermoset composites
and acrylics production with their different applications/functions.
For more information please check our website and/or contact us.
Half-life data
Thereactivity of an organic peroxide is usually given by its half-life (t1/2) at
various temperatures. For BPO75 in chlorobenzene half-life at other
temperatures can be calculated by using the equations and constants mentioned
below:
0.1 hr at 113°C (235°F)
1 hr at 91°C (196°F)
10 hr at 71°C (160°F)
Formula1 kd = A·e-Ea/RT
Formula2 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
Half-life data
Organicperoxides are thermally unstable substances, which may undergo
self-accelerating decomposition. The lowest temperature at which
self-accelerating decomposition of a substance in the original packaging may
occur is the Self-Accelerating Decomposition Temperature (SADT). The SADT is
determined on the basis of the Heat Accumulation Storage Test.
SADT 80°C
Emergencytemperature (Tₑ ) 75°C
Method The Heat Accumulation Storage Test is a recognized test method for the determinationof the SADT of organic peroxides (see Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria - United Nations, New York and Geneva).
Storage
Dueto the relatively unstable nature of organic peroxides a loss of quality can be
detected over a period of time. To minimize the loss of quality, Do Sender Chem
recommends a maximum storage temperature (Ts max. ) for each organic peroxide.
TsMax. 40°C
Note When stored under the recommended storageconditions, BPO75 will remain within theDo Sender Chem specifications for a periodof at least 3 months after delivery.
Storage Packaging and transport
Packedin plastic drums with specifications of 1000kg, 200kg, and 25kg.
BPO75 is classified as Organic peroxide type C; solid, Division 5.2; UN 3104; PG II.
Major decomposition products
Carbondioxide, Benzene, Benzoic acid
BPO
Appearance
White particles
Content%
74-76
Water%
22-25
Free Chlorine%
≤0.3
Free Acid%
≤0.5