Moisture sorption properties and glass transition temperature of a non-conventional exudate gum (Prosopis alba) from northeast Argentine

•Sorption properties of P. alba gum were similar to other commercial exudate gums.•GAB and GDW models provided information on compositional and structure features.•Multi temperature sorption study provides useful thermodynamic functions.•State diagram allowed obtaining the suitable storage conditions of the gum.•Results extend the potential applications of this currently unused material.