This Malaysian Standard specifies test methods for the determination of the self-accelerating decomposition temperature (SADT). The SADT is defined as the lowest temperature at which self-accelerating decomposition may occur with a substance in the packaging as used in transport. The SADT is a measure of the combined effect of the ambient temperature, decomposition kinetics, package size and the heat transfer properties of the substance and its packaging. To assist in interpreting the results, models can be used in which the main resistance to heat flow is:
a) at the boundary i.e. packaging (Semenov model);
b) within the substance (Frank-Kamentskii model); or
c) a combination of these (Thomas model).
This standard is used in conjunction with the temperature control requirements given in 5.4 of MS 1513- 2-6:2003.