Harmonized Tariff Schedule of the United States · HTS code · HS 3507.90
3507.90.20: Enzymes; prepared enzymes not elsewhere specified: other, pencillin G amidase
Other enzymes
Not declarable on its own: use one of its 1 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026
- 3507 Enzymes; prepared enzymes not elsewhere specified or included:
- 3507.90 Other:
- 3507.90.20 Pencillin G amidase
What you pay
Importing into USA
US additional duties of HTS chapter 99 in force on 22 October 2026 are included (Section 301, 232, 338 and 201). IEEPA duties are no longer collected after the Supreme Court ruling of February 2026. Conditional exemptions (US content, end use, metal share) are not computed: check the provision.
Additional duties and import rules
Charges on top of the customs duty, and rules the goods must meet at the border.
Additional duties and charges 1
- Additional dutySection 301 — China — technology transfer, IP and innovation (2018 actions and 2024 four-year review) 25%
- Applies to goods from
- China
- In force
- from 24 September 2018
- Legal act
- HTSUS 9903.88.03
Same subheading in other tariffs
3507.90 Enzymes; prepared enzymes not elsewhere specified: other
UK Free Third-country duty 4 tariff lines 
EU Free – 6.3% Third-country duty 2 tariff lines · average 3.2% 
Türkiye Free – 6.3% Third-country duty 5 tariff lines · average 5% 
Canada Free General (MFN) 1 tariff line 
Mexico Free – 5% General (MFN) 8 tariff lines · average 2.5% 
Brazil Free – 12.6% General (MFN) 15 tariff lines · average 9.2% 
Argentina Free – 12.6% General (MFN) 17 tariff lines · average 9.6% 
Peru Free General (MFN) 7 tariff lines 
New Zealand Free General (MFN) 1 tariff line 
Japan 3.9% General (MFN) 1 tariff line 
Taiwan 5% General (MFN) 1 tariff line 
GCC 5% General (MFN) 8 tariff lines 
Switzerland Free General (MFN) 1 tariff line 
Norway Free General (MFN) 1 tariff line 
North Macedonia Free General (MFN) 2 tariff lines 
Nigeria 10% General (MFN) 1 tariff line USA lines: 3507.90
Binding rulings for similar goods
Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.
- N364610 U.S. CBP
The tariff classification of Glucose Dehydrogenase “Amano” 8 from Japan
- N346628 U.S. CBP
The tariff classification of powdered bromelain from India
- N336109 U.S. CBP
The tariff classification of an enzyme preparation from New Zealand
- N313623 U.S. CBP
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
11 rulings in total for this code
Legal notes
HTS code 3507.90.20 is a line of the Harmonized Tariff Schedule of the United States under HS subheading 3507.90 (enzymes; prepared enzymes not elsewhere specified: other).
The general duty is free, and quantities are declared in kg.
For the same subheading, the UK duty is free, the EU duty is 0%–6.3%, the Türkiye duty is 0%–6.3%, the Canada duty is free, the Mexico duty is 0%–5%, the Brazil duty is 0%–12.6%, the Argentina duty is 0%–12.6%, the Peru duty is free, the New Zealand duty is free, the Japan duty is 3.9%, the Taiwan duty is 5%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is free and the Nigeria duty is 10%.
The United States imported goods of subheading 3507.90 worth US$988m in 2024; the largest supplier was Denmark, and the United Kingdom ranked 8th with US$33m.
Questions and answers
What is the USA import duty for HTS code 3507.90.20?
The general duty in the Harmonized Tariff Schedule of the United States is free; the supplementary unit is kg. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.
Where does the United States import these goods from?
For subheading 3507.90 as a whole, the largest supplier in 2024 was Denmark (US$246m), followed by Japan.