Heading 3507

Enzymes; prepared enzymes not elsewhere specified or included

4 declarable lines

Heading 3507 covers enzymes and prepared enzyme products. It separates rennet, Penicillin G amidase, named enzyme classes such as proteases and amylases, and all other prepared enzymes. The listed lines carry a Free general (MFN) rate.

Products in this heading

Rennet for cheese making
Protease enzyme preparation for protein hydrolysis
Amylase preparation for baking or brewing
Lipase preparation for dairy or oil processing
Cellulase preparation for textile or cleaning uses
Pectinase preparation for juice clarification
Catalase preparation for food processing
Penicillin G amidase for pharmaceutical processing

How to choose the right subheading

Check whether the product is rennet or a rennet concentrate; if yes, use 3507.10.00.00.
If not rennet, check whether the enzyme is Penicillin G amidase; if yes, use 3507.90.20.00.
If the enzyme is a protease, amylase, lipase, cellulase, pectinase, oxidase, or catalase preparation, use 3507.90.70.10.
If it is another prepared enzyme not named above, use 3507.90.70.80.
Confirm the product is an enzyme or prepared enzyme, not a glue, starch, casein, or albumin product.

Often confused with

Prepared glues and adhesives
These are adhesives, not enzyme preparations.
Heading 3506
Dextrins and modified starches
These are starch products, not enzymes.
Heading 3505
Casein and caseinates
These are milk protein products, not enzymes.
Heading 3501
Albumins and albumin derivatives
These are protein products, not enzymes.
Heading 3502

Frequently asked questions

What is the HTS code for rennet?

Rennet and concentrates are classified under 3507.10.00.00, which has a general (MFN) rate of Free.

What is the duty on prepared enzymes?

The listed enzyme lines are duty free; for example, 3507.90.70.10 has a general (MFN) rate of Free. The same Free general (MFN) rate applies to 3507.90.70.80.

How do I classify a protease enzyme preparation?

A protease preparation is named in 3507.90.70.10, which has a general (MFN) rate of Free. If the product is rennet instead, use 3507.10.00.00 with its Free general (MFN) rate.

Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.