Division 2.11.4 Additional Classification Considerations United Kingdom Original text. Later amendments are not shown. Figure 2.11.1. Self-heating substances and mixtures 2.11.4.1Division 2.11.4.1 2.11.4.2The classification procedure for self-heating substances or mixtures need not be applied if the results of a screening test can be adequately correlated with the classification test and an appropriate safety margin is applied. Examples of screening tests are: ← Division 2.11.3 Division 2.11.4 Division 2.11.4.1 →