An
adduct (from the Latin
adductus, "drawn toward") is a product of a
direct addition of two or more distinct molecules, resulting in a single reaction product containing all atoms of all components. The resultant is considered a distinct molecular species. Examples include the adduct between
hydrogen peroxide and
sodium carbonate to give
sodium percarbonate, and the addition of
sodium bisulfite to an
aldehyde to give a
sulfonate. It can just be considered as a single product resulting from direct addition of different molecules and constitutes all the reactant molecules' atoms.