Abstract: Heat-treated lactic and/or glycolic acid compositions are provided herein which are useful for antimicrobial treatment of surfaces, preferably food surfaces including fruits, vegetables and animal carcasses and of particulate materials, preferably ground meats, or other materials into which the compositions may be mixed. The heat-treated lactic and/or glycolic acid compositions have an average molecular weight preferably less than or equal to about 700 D and are mixtures of single molecules of the acid and ester complexes of the acid molecules containing two to no more than about ten molecules per complex. Preferably, these compositions comprise more than about 50 weight percent of the ester complexes, and more preferably about 75 weight percent. Aqueous solutions of these compositions and methods for making and using the compositions are also provided, as are food materials comprising such compositions.

Abstract: Heat-treated lactic and/or glycolic acid compositions are provided herein which are useful for antimicrobial treatment of surfaces, preferably food surfaces including fruits, vegetables and animal carcasses. These heat-treated lactic and/or glycolic acid compositions have an average molecular weight preferably less than or equal to about 700 D and are mixtures of single molecules of the acid and ester complexes of the acid molecules containing two to no more than about ten molecules per complex. Preferably, these compositions comprise more than about 50 weight percent of the ester complexes, and more preferably about 75 weight percent. Aqueous solutions of these materials and methods for making and using the materials are also provided.