Harmonized Tariff Schedule of the United States · HTS code · HS 2901.24
2901.24.50: Butadiene and isoprene: Acyclic hydrocarbons, unsaturated, buta-1,3-diene and isoprene, isoprene, other
Butadiene and isoprene
Not declarable on its own: use one of its 1 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026
- 2901 Acyclic hydrocarbons:
- Unsaturated:
- 2901.24 Buta-1,3-diene and isoprene:
- Isoprene:
- 2901.24.50 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 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
2901.24 Acyclic hydrocarbons, unsaturated, buta-1,3-diene and isoprene
UK Free Third-country duty 1 tariff line 
EU Free Third-country duty 1 tariff line 
Türkiye Free Third-country duty 1 tariff line 
Canada Free Third-country duty 1 tariff line 
Mexico Free Third-country duty 1 tariff line 
Brazil Free Third-country duty 2 tariff lines 
Argentina Free Third-country duty 3 tariff lines 
Peru Free Third-country duty 1 tariff line 
New Zealand Free Third-country duty 1 tariff line 
Japan Free Third-country duty 2 tariff lines 
Taiwan Free Third-country duty 2 tariff lines 
GCC Free Third-country duty 1 tariff line 
Switzerland Free Third-country duty 4 tariff lines 
Norway Free Third-country duty 1 tariff line 
North Macedonia Free Third-country duty 1 tariff line 
Nigeria 5% Third-country duty 1 tariff line USA lines: 2901.24
Legal notes
In the Harmonized Tariff Schedule of the United States, 2901.24.50 is one of 3 lines under subheading 2901.24, acyclic hydrocarbons, unsaturated, buta-1,3-diene and isoprene.
The general duty is free, and quantities are declared in kg.
For the same subheading, the UK duty is free, the EU duty is free, the Türkiye duty is free, the Canada duty is free, the Mexico duty is free, 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 free, the Taiwan duty is free, the GCC duty is free, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is free and the Nigeria duty is 5%.
The United States imported goods of subheading 2901.24 worth US$168m in 2024; the largest supplier was South Korea.
Questions and answers
What is the USA import duty for HTS code 2901.24.50?
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 2901.24 as a whole, the largest supplier in 2024 was South Korea (US$52m), followed by Brazil.