Dextrin, amorphous, soluble carbohydrate, (C6H10O5)n, produced by the action on starch paste of acids, heat, or enzymes such as diatase. The first product formed in this reaction is soluble starch, which in turn hydrolyzes to form dextrin. Dextrin is prepared commercially by moistening potato starch with weak nitric acid and then drying and heating the mass at 110° C (230° F). Dextrin is used in the manufacture of beer and as a substitute for gum arabic in printing cotton fabrics. It is also used commercially as an adhesive.