Dipicolinic acid forms a complex with calcium ions within the endospore core. This complex binds free water molecules, causing dehydration of the spore. As a result, the heat resistance of macromolecules within the core increases.
D 2347 (OTTO) 2,6-Dipicolinic acid, 99% Cas no 499-83-2 - used to prepare dipicolinato ligated lanthanide and transition metal complexes for ion chromatography.