Harmonized Tariff Schedule of the United States · HTS code · HS 3815.19
3815.19.00: Other supported catalysts: Reaction initiators, reaction accelerators and catalytic: supported catalysts, other
Other supported catalysts
Not declarable on its own: use one of its 1 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026
- 3815 Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included:
- Supported catalysts:
- 3815.19.00 Other
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 dutyRussia rate increase (Pub. L. 117-110) — Russian Federation (rates in lieu of column 2) 35%
- Applies to goods from
- Russia
- In force
- from 28 June 2022
- Legal act
- HTSUS 9903.90.08
Footnotes
- 9903.90.08 Articles the product of the Russian Federation, as provided for in U.S. note 30(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 30(b) to this subchapter
Same subheading in other tariffs
3815.19 Reaction initiators, reaction accelerators and catalytic: supported catalysts, other
UK Free – 6% Third-country duty 12 tariff lines · average 5.5% 
EU Free – 6.5% Third-country duty 2 tariff lines · average 3.3% 
Türkiye Free – 6.5% Third-country duty 2 tariff lines · average 3.3% 
Canada Free Third-country duty 2 tariff lines 
Mexico Free – 10% Third-country duty 2 tariff lines · average 5% 
Brazil Free Third-country duty 1 tariff line 
Argentina Free Third-country duty 1 tariff line 
Peru Free Third-country duty 2 tariff lines 
New Zealand Free Third-country duty 1 tariff line 
Japan Free – 2.2% Third-country duty 3 tariff lines · average 1.5% 
Taiwan 1% Third-country duty 1 tariff line 
GCC 5% Third-country duty 2 tariff lines 
Switzerland Free Third-country duty 1 tariff line 
Norway Free Third-country duty 1 tariff line 
North Macedonia Free Third-country duty 2 tariff lines 
Nigeria 10% Third-country duty 1 tariff line 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.
- H311151 U.S. CBP
Protest and Application for Further Review of Protest No. 5301-20-103261; tariff classification of Unicat SR-110CX Zinc Oxide Adsorbent; application of Section 301 trade remedies
- N306097 U.S. CBP
The tariff classification and country of origin of Spray Dried Copper Zeolite Catalysts from various countries; Article 509.
Legal notes
In the Harmonized Tariff Schedule of the United States, 3815.19.00 is one of 1 line under subheading 3815.19, reaction initiators, reaction accelerators and catalytic.
The general duty is free, and quantities are declared in kg.
For the same subheading, the UK duty is 0%–6%, the EU duty is 0%–6.5%, the Türkiye duty is 0%–6.5%, the Canada duty is free, the Mexico duty is 0%–10%, the Brazil duty is free, the Argentina duty is free, the Peru duty is free, the New Zealand duty is free, the Japan duty is 0%–2.2%, the Taiwan duty is 1%, 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 3815.19 worth US$399m in 2024; the largest supplier was Japan.
Questions and answers
What is the USA import duty for HTS code 3815.19.00?
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 3815.19 as a whole, the largest supplier in 2024 was Japan (US$68m), followed by China.