Microbial Rennet Paste
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If marketed as generic protease enzyme, not rennet
Heading 3507.10 is specific to rennet; other microbial enzymes go to subheading 3507.90.
If for pharmaceutical-grade rennet in drug formulations
Medicinal enzyme preparations shift to Chapter 30, excluding simple food-grade concentrates.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• 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
Related Products under HTS 3507.10.00.00
Liquid Calf Rennet
Liquid rennet extracted from the stomachs of calves, used primarily in cheesemaking to coagulate milk into curds. It falls under HTS 3507.10.00.00 as a natural enzyme preparation specifically classified as rennet. This product is essential for traditional cheese production like Cheddar and Parmesan.
Rennet Powder Concentrate
Dried powder form of rennet concentrate from bovine sources, standardized for cheesemaking applications. Classified under HTS 3507.10.00.00 due to its high concentration of chymosin enzyme. Ideal for industrial dairy processing with long shelf life.
Bovine Rennet Tablets
Compressed tablets of concentrated calf rennet for home cheesemakers and small-scale producers. HTS 3507.10.00.00 applies as it is a rennet concentrate in solid form. Each tablet delivers precise coagulation for artisanal cheese.
Fermentation-Produced Chymosin Concentrate
High-purity liquid concentrate of chymosin produced via genetically engineered yeast fermentation. Classified as rennet concentrate under HTS 3507.10.00.00 when specifically for milk coagulation. Standard in large-scale cheese manufacturing.
Dry Rennet Blend for Artisanal Cheese
Powdered rennet concentrate blended minimally for stability in artisanal cheesemaking. Remains under HTS 3507.10.00.00 as primary rennet component exceeds concentrate thresholds. Popular for specialty European cheese varieties.