HS Code for Rennet

Rennet is classified under HS code 3507.10, which specifically covers enzymes and prepared enzymes not elsewhere specified or included, with a particular subheading for rennet and its concentrates. The classification is determined by the biochemical nature of the product; rennet is a complex of enzymes produced in the stomachs of ruminant mammals, primarily containing chymosin. In the Harmonized System, Chapter 35 encompasses albuminoidal substances, modified starches, glues, and enzymes. Because rennet acts as a catalyst in the cheesemaking process to coagulate milk, it fits the functional definition of an enzyme. The classification remains consistent whether the rennet is of animal origin, microbial origin (often referred to as microbial rennet), or vegetable origin, provided it is processed into a concentrated enzymatic preparation. The General Rules for the Interpretation (GRI) of the Harmonized System dictate that products are classified according to the terms of the headings and any relative section or chapter notes. Since heading 35.07 specifically names enzymes, and subheading 3507.10 specifically names rennet, this is the primary classification for the product in its concentrated form.

Products Included

• Natural calf rennet (liquid, powder, or paste)
• Bovine rennet concentrates
• Microbial rennet preparations (fungal proteases)
• Chymosin produced via fermentation (FPC)
• Vegetable-based rennet enzymes
• Rennet tablets for industrial cheesemaking

Common Misclassification

Rennet is frequently misclassified under HS code 2106.90, which covers food preparations not elsewhere specified. This usually occurs when the rennet is mixed with significant amounts of other ingredients like salt, flavorings, or preservatives that change its character from a pure enzyme to a food additive. Another common error is using HS code 0504.00 for dried calves' stomachs; while these are the source of rennet, the stomachs themselves are classified as animal products, whereas the extracted enzyme is classified under 3507.10. Additionally, pure chemical enzymes might be confused with Chapter 29 (Organic Chemicals), but Chapter 35 takes precedence for prepared enzymes.

FAQ

What is the HS code for Rennet?

The primary HS code for rennet and its concentrates is 3507.10.

Does microbial rennet use the same HS code as animal rennet?

Yes, most customs authorities classify microbial rennet under 3507.10 because it serves the same enzymatic function and is marketed as a rennet substitute, though some jurisdictions may look at 3507.90 if it is not specifically labeled as a rennet concentrate.