CAS No.
105-74-8
TSCA Status
listedon inventory
Active oxygen content peroxide
4.01%
EINECS/ELINCS No.
203-326-3
Molecular weight
398.6
Bulk density, 20 °C
0.460kg/m³
Melting point
54 °C
LPOis a widely used initiator for the suspension and mass polymerization of vinyl
chloride between 60°C and 80°C. In many cases LPO is combined with a more
active initiator, such as a peroxydicarbonate toincrease reactor efficiency. LPO is
usedas an initiator for the high pressure polymerization of ethylene, but because
of its poor solubility in most aliphatics, itis in many cases replaced by other peroxides such as
Di(3,5,5-trimethylhexanoyl) peroxide (TMHP). The advantage of LPO is the
possibility of storing at ambient temperature. LPO is also used as an initiator
for the polymerization of methylmethacrylate at60-90°C. LPO is often applied as a replacement for 2,2'-Azobis(isobutyronitril)(AIBN).
Applications
LPOcan 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 LPO in chlorobenzene:
0.1 hr at 99°C
1 hr at 79°C
10 hr at 61°C
Formula1 kd = A·e-Ea/RT
Formula2 t½ = (ln2)/kd
Ea 123.37 kJ/mole
A 3.92E+14 sP-1P
R 8.3142 J/mole·K
T (273.15+°C) K
Thermal stability
Organic peroxides are thermallyunstable 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 50°C
Method The Heat Accumulation Storage Test is a recognized test method forthe
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 product.
Ts Max. 30°C
Note When stored under these recommended storage conditions, LPO will remain within the Do Sender Chemspecifications for a period of at least 3 monthsafter delivery.
Packaging and transport
20 kgcorrugated box packaging
LPOis classified as Organic peroxide type D; solid, Division 5.2; UN 3106.
Major decomposition products
Carbondioxide, Docosane,Undecane, Undecyl dodecanoate.
LPO
Appearance
White powdery or flaky solid
Content
98% min
Cl-
Max 0.25%
Lauric acid
Max 0.5%