Perodox LUNA, chemically known as ​Dilauroyl Peroxide (also referred to as ​Lauroyl Peroxide, CAS 105-74-8), is a highly efficient organic peroxide initiator, is 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 to increase reactor efficiency. LPO is used as an initiator for the high pressure polymerization of ethylene, but because of its poor solubility in most aliphatics, it is 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 at 60-90°C. LPO is often applied as a replacement for 2,2'-Azobis(isobutyronitril) (AIBN).

CAS No.

105-74-8

TSCA Status

listed on 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

Molecular formula: C₂₄H₄₆O₄

Molecular weight: 398.6

Theoretical active oxygen content: 4.01%

CAS：105-74-8

Einecs：203-326-3

Main decomposition products: CO2, laurate

The reactivity 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

Organic peroxides 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 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)

Due to 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.

20 kg corrugated box packaging

LPO is classified as Organic peroxide type D; solid, Division 5.2; UN 3106. PG II

Carbon dioxide, Docosane, Undecane, Undecyl dodecanoate.

Property Dilauroyl Peroxide TMHP AIBN

StorageTemp​ Ambient Refrigeration Refrigeration

Activation Range 60-80°C 40-60°C 60-80°C

Byproduct Safety Non-cyanide Low toxicity​ Toxic nitriles