Glucono-delta-lactone and gluconic acid are essentially the same substance. The gluconic acid, will becomes a high concentration was circularized by intramolecular gluconodeltalactone (GDL), the property of crystallizing. GDL has taken the GDL precipitated by concentrating an aqueous solution of gluconic acid by utilizing this property, is obtained and purified. The GDL is the property of gradually returning to gluconic acid dissolved in water. As the food additive, easy-to-use white crystalline or powdered GDL has been generally used. Its principal use is the coagulant for tofu, also has a great application also used as the acidic component of the leavening agent formulation. Other is the use as a general acidulant and pH adjusting agents.
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