Microbial Rennet Paste from Mexico
Thick paste concentrate of microbially produced chymosin, mimicking calf rennet for vegan cheesemaking. Despite functional similarity, it is classified under HTS 3507.10.00.00 when labeled and sold as rennet substitute concentrate. Widely used in modern dairy industries.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Submit FDA biotech consultation summary if genetically engineered, as microbial rennet often is
• Declare exact chymosin activity and production method to avoid reclassification as general protease
• Use refrigerated shipping to maintain enzyme viability, with temperature logs for import inspection