Tandom · Duty calculator
Add country and invoice value for the full duty stack — base + 301 + 232 + AD/CVD + fees.
HTS 3507.90.70.00 is the U.S. Harmonized Tariff Schedule classification for Enzymes; prepared enzymes not elsewhere specified or included, other. It's a 10-digit statistical line in Chapter 35: Albuminoidal substances; modified starches; glues; enzymes, Section VI: Products of the Chemical or Allied Industries, used by U.S. Customs and Border Protection to determine the duty rate at entry. No Chapter 99 tariff modifications (Section 301, Section 232, IEEPA) or AD/CVD orders currently flag this code in Tandom's catalog.
New to HTS codes? Read our guide on how HTS classification works →
Past CBP decisions classifying real products under this HTS code. Useful precedent when classifying a similar product — each ruling shows how CBP interpreted the code for a specific case.
The tariff classification of powdered bromelain from India
The tariff classification of an enzyme preparation from New Zealand
The tariff classification of MuLV Reverse Transcriptase, MuLV Reverse Transcriptase Plus, Super Reverse Transcriptase MuLV, Super Reverse Transcriptase MuLV (Super RT 50 reaction kit), and RNase Inhibitor from India
The tariff classifications of DNA polymerase sets and a pre-mixture from India.
The tariff classification of various chemical compounds from China
Source: CBP CROSS (view all rulings on rulings.cbp.gov →)
HTS 3507.90.70.00 is the U.S. Harmonized Tariff Schedule classification for Enzymes; prepared enzymes not elsewhere specified or included, other. It belongs to Chapter 35 of the HTSUS.
The general (Column 1) duty rate for HTS 3507.90.70.00 is Free. This is the most-favored-nation (MFN) rate that applies to imports from World Trade Organization member countries.
The Column 2 rate for HTS 3507.90.70.00 is 25%. This rate applies to imports from countries that do not have normal trade relations with the United States (currently Cuba and North Korea).
No active Chapter 99 tariff overlays (Section 301, Section 232, IEEPA reciprocal, etc.) currently flag HTS 3507.90.70.00 in Tandom's catalog. Use the calculator's date + origin inputs to confirm against any retroactive overlay you may be filing.
No active AD/CVD orders currently flag HTS 3507.90.70.00 in Tandom's catalog. Tandom monitors Federal Register notices daily; a flag will appear here within 24h of any new order's publication.
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