Specifications

Active oxygen	6.02-6.27 %
Appearance	Clear liquid
Assay	49.0-51.0 %
Color	30 Pt-Co / APHA max.
Hydroperoxides as TBHP	0.099 %

Characteristics

Density, 20 °C	0.900 g/cm³
Viscosity, 20 °C	35 mPa.s

Applications

Polymerization of styrene: CH 22-E50 can be used for the bulk polymerization of styrene in the temperature range between 90 and 120°C. Other applications: CH 22-E50 can also be used for the (co)polymerization of styrene,acrylonitrile, acrylates and methacrylates in the temperature range between 95°C and 125°C.

Half-life data

The reactivity of an organic peroxide is usually given by its half-life (t1/2) at various temperatures. For CH 22-E50 in chlorobenzene:

0.1 hr	134°C (273°F)
1 hr	113°C (235°F)
10 hr	94°C (201°F)
Formula 1	kd = A·e-Ea/RT
Formula 2	t½ = (ln2)/kd
Ea	142.40 kJ/mole
A	3.47E+15 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 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	70°C (158°F)
Method	The Heat Accumulation Storage Test is a recognized test method for the determination of 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

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, Nouryon recommends a maximum storage temperature (Ts max.) for each organic peroxide product.

Ts max.	25°C (77°F)
Note	When stored under these recommended storage conditions, CH 22-E50 will remain within the Nouryon specifications for a period of at least three months after delivery.

Packaging and transport

The standard packaging is a 30-liter HDPE can for 25 kg peroxide solution. Both packaging and transport meet the international regulations. For the availability of other packed quantities contact your thousands chemicals representative. CH 22-E50 is classified as Organic peroxide type D; liquid, Division 5.2; UN 3105.

Safety and handling

Keep containers tightly closed. Store and handle CH 22-E50 in a dry well-ventilated place away from sources of heat or ignition and direct sunlight. Never weigh out in the storage room. Avoid contact with reducing agents (e.g. amines), acids, alkalis and heavy metal compounds (e.g. accelerators, driers and metal soaps). Please refer to the Safety Data Sheet (SDS) for further information on the safe storage, use and handling of CH 22-E50. This information should be thoroughly reviewed prior to acceptance of this product.

Major decomposition products

Carbon dioxide, Methane, tert-Butanol, Acetone, Hexanoic acid