STORAGE


Storage Conditions for Organic Peroxides

Limiting the heat exposure of the product and preventing contamination can minimize the probability of a peroxide decomposition. Temperature control is the most critical control measure in preserving quality and preventing a runaway reaction.

We also have clear guidelines for design of storage buildings and fire fighting, and do's and don'ts for storage of organic peroxides.

Safety temperatures

Although a number of organic peroxides can safely be stored at room temperature, most require some form of temperature control. The maximum temperature allowed by the regulatory agencies is the control temperature (Tc). The emergency temperature (Tem) is the temperature at which emergency procedures must be implemented.

Both the control and emergency temperature are derived from the SADT:

Type of container SADT Emergency temperature(Tem) Control temperature (Tc)
Single packages and IBCs <20°C 10°C below SADT 20°C below SADT
  20°C < SADT ≤35°C 10°C below SADT 15°C below SADT
  >35°C 5°C below SADT 10°C below SADT
Portable tanks <50°C 5°C below SADT 10°C below SADT

Quality temperatures

For a longer shelf life, we recommend you to store our products at lower temperatures than the control temperatures. This recommended maximum storage temperature (Ts max.) is printed on the product label as well as on specific Product Data Sheets (PDS) and Material Safety Data Sheets (MSDS).

A minimum storage temperature (Ts min.) is given if phase separation, crystallization or solidification of the products is known to occur below a specific temperature. Also for safety reasons we recommend you to store the product above the Ts min. indicated.

Please contact us to discuss how we can address your safety concerns and to learn more about organic peroxide temperature control, fire fighting, building design and do's and don'ts.

In general, one of the most important factors to observe when working with organic peroxides is the required storage temperature. The recommended max. storage temperature (Ts max.) is printed on the product labels as well as on specific Product Data Sheets (PDS) and Material Safety Data Sheets (MSDS).

During storage the peroxide must be kept below max. storage temperature(Ts max.) If a minimum storage temperature (Ts min.) is given this means that phase separation, crystallization or solidification can occur. Therefore that peroxide must be kept between min and max. storage temperatures. For safety reasons the maximum temperature allowed by the regulatory agencies is the control temperature (Tc). The emergency temperature (Tem) is the temperature at which emergency procedures must be implemented. Both control (Tc) and Emergency temperatures (Tem) are specified according to SADT

SADT Control Temperature Emergency Temperature Maximumu storage Temperature
20 ºC or less 20 ºC below SADT 10 ºC below SADT Control temperature
20 ºC-35 ºC 10 ºC below SADT 10 ºC below SADT Control temperature
Over 35 ºC 10 ºC below SADT 5 ºC below SADT Control temperature or45ºC

When the package size is bigger the surface area/volume of peroxide is small therefore there is less heat transfer area and lower temperatures are recommended. For a longer shelf life, storage at lower temperatures than the control temperatures is recommended. Due to their specific properties organic peroxides cannot simply be put in any chemical stock-room for chemicals. Separate storage facilities are recommended. All peroxides must be stored in an isolated area, handled only by trained personnel.

Ventilation is important because air circulation around peroxides stored at low temperature reduces the chance of localized hot spots that can cause decomposition. Organic peroxides inventory should be rotated to avoid shelf life problems. The storage must be free of all combustible material.If the peroxide is volatile electrical equipments should be explosion proof. Class I Division II Group D is sufficient for D group organic peroxides.

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