Self-reactive materials chemical reactivity hazard

Self-accelerating decomposition temperature (SADT), screening methods, 56 Self-reactive materials chemical reactivity hazard, 1,2 screening methods, 54-58 Seveso, Italy incident, 4 Seveso II Directive, 5-6,27 Shelf life... 

Chemical Hazards. Chemical manufacturers and employees contend with various ha2ards inherent ia productioa of evea commonplace materials. For example, some catalysts used ia the manufacture of polyethylene (see Olefin polymers) ignite when exposed to air or explode if allowed to become too warm the basic ingredient ia fluorocarboa polymers, eg, Tefloa (see Fluorine compounds, organic), can become violently self-reactive if overheated or contaminated with caustic substances (45,46) one of the raw materials for the manufacture of acryflc fibers (see Fibers, acrylic) is the highly toxic hydrogen cyanide (see Cyanides). 

If the answer to Question 11 is YES, then you should make use of the information in Chapter 4, because a chemical reactivity hazard is present. The essential practices presented in Chapter 4 should be sufficient to manage this type of chemical reactivity hazard, excluding considerations for commercial explosives, which are also self-reactive materials. 

This test is not very accurate, although it is widely used to evaluate the hazards of organic peroxides. A new test procedure has been developed to classify the violence of decomposition of self-reactive chemicals into three levels. In the new test, only 1mm and 9mm orifices are used. Ten trials are conducted for each diameter, and the chemicals which explode 5 times or more are classified as medium and highly hazardous materials, respectively.This test has been adopted to classify hazardous materials under the Fire Services Law (See Chapter 3). 

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