INITIATEUR DE POLYMÉRISATION CHIMIQUE, COMPOSITION ADHÉSIVE, KIT DE COMPOSITION ADHÉSIVE, PRODUIT DENTAIRE, KIT DE PRODUIT DENTAIRE, ET PROCÉDÉ DE STOCKAGE DE COMPOSITION ADHÉSIVE
Provided are: such a chemical polymerization initiator that the chemical polymerization initiator is used in chemical polymerization in a system in which an acid component is present, and that under a state before use, respective components forming the chemical polymerization initiator are dividedly blended into two or more partial initiator compositions maintained in a state of being incapable of chemical contact with each other, the chemical polymerization initiator having high storage stability and high polymerization activity; an adhesive composition, an adhesive composition kit, a dental material, and a dental material kit each using the chemical polymerization initiator; and a method of storing the adhesive composition. Specifically, provided are a chemical polymerization initiator including (a) a thiourea compound, (b) a peroxyester, (c) a divalent copper compound, and (d) an aryl borate compound, an adhesive composition, an adhesive composition kit, a dental material, and a dental material kit each using the chemical polymerization initiator, and a method of storing the adhesive composition.