Tartaric Acid Esters from Mexico
Mono- or diesters of tartaric acid with C1-C6 alcohols, retaining free carboxyl and hydroxyl functions. HTS 2918.99.5000 as carboxylic acids with additional oxygen function. Used in chiral synthesis and food antioxidants.
Duty Rate — Mexico → United States
4%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Chiral specification (L/D/±) mandatory for invoice; affects pharma intermediate valuation
• GRAS status requires FDA affirmation documentation for food use
• Mixtures of tartaric esters >2 isomers may classify under Chapter 29 note (b)