This chapter contains sections titled: Introduction Autocatalytic Decompositions Definitions Autocatalysis Induction Time Behavior of Autocatalytic Reactions Rate Equations of Autocatalytic Reactions The Prout–Tompkins Model The Benito–Perez Model The Berlin Model Phenomenological Aspects of Autocatalytic Reactions Characterization of Autocatalytic Reactions Chemical Characterization Characterization by Dynamic DSC Peak Aspect in Dynamic DSC Quantitative Characterization of the Peak Aspect Characterization by Isothermal DSC Characterization Using Zero-order Kinetics Characterization Using a Mechanistic Approach Characterization by Isoconversional Methods Characterization by Adiabatic Calorimetry Practical Safety Aspects for Autocatalytic Reactions Specific Safety Aspects of Autocatalytic Reactions Assessment Procedure for Autocatalytic Decompositions Exercises References