Glucono-Delta-Lactone from Mexico
Glucono-delta-lactone (GDL) is the lactone form of gluconic acid, chemically defined under additional U.S. note 3 as an oxygen-function carboxylic derivative. Falls under HTS 2918.99.4300 for these specified cyclic forms. Used as sequestrant and leavening agent in food.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include lactone purity assay to distinguish from free acid forms
• GRAS status documentation speeds FDA clearance for food use
• Avoid Chapter 29 exclusion by confirming not excluded cyclic ester per notes