The original mechanism of the solid-state combustion, ignited by local addition of microquantities of water to mixture of disperse piperazine and malonic acid (hydroignition), was proposed. It consists eliminating the diffusion barrier at dissolving the product crust previously formed on the reagent particles at them mixing and jumping mechanism of proton transfer (Grotthuss mechanism). The data obtained and their explanations seems unusual from the point of view of ignition theory which did not consider ignition as a non-thermal process at the expense of intrinsic resources of reacting solids. New method of ignition (hydroignition) can be successfully applied for effective one-pot click synthesis of both organic and inorganic products in the self-propagating high temperature synthesis (SHS) mode and for designing of autonomous ignition systems of mixes. (C) 2018 The Combustion Institute. Published by Elsevier Inc. All rights reserved.