Harmonized Tariff Schedule of the United States · HTS code · HS 2815.20
2815.20.00: Potassium hydroxide (Caustic potash)
Not declarable on its own: use one of its 2 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026
- 2815 Sodium hydroxide (Caustic soda); potassium hydroxide (Caustic potash); peroxides of sodium or potassium:
- 2815.20.00 Potassium hydroxide (Caustic potash)
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
Subdivisions
- 2815.20.00 Potassium hydroxide (Caustic potash) Free
- 2815.20.00.50 In solid form kg
- 2815.20.00.90 Other kg
Same subheading in other tariffs
2815.20 Potassium hydroxide (caustic potash)
UK 4% Third-country duty 1 tariff line 
EU 5.5% Third-country duty 1 tariff line 
Türkiye 5.5% Third-country duty 1 tariff line 
Canada Free General (MFN) 2 tariff lines 
Mexico Free General (MFN) 2 tariff lines 
Brazil 5.4% General (MFN) 1 tariff line 
Argentina 5.4% General (MFN) 2 tariff lines 
Peru Free General (MFN) 1 tariff line 
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) 1 tariff line 
Switzerland Free General (MFN) 1 tariff line 
Norway Free General (MFN) 1 tariff line 
North Macedonia Free – 5% General (MFN) 2 tariff lines · average 2.5% 
Nigeria 5% General (MFN) 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.
- N272550 U.S. CBP
The tariff classification of Potassium Hydroxide (CAS # 1310-58-3) from Russia
Legal notes
HTS code 2815.20.00 is a line of the Harmonized Tariff Schedule of the United States under HS subheading 2815.20 (potassium hydroxide (caustic potash)).
The general duty is free.
2 statistical sub-lines below it are used in the declaration.
For the same subheading, the UK duty is 4%, the EU duty is 5.5%, the Türkiye duty is 5.5%, the Canada duty is free, the Mexico duty is free, the Brazil duty is 5.4%, the Argentina duty is 5.4%, 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 0%–5% and the Nigeria duty is 5%.
The United States imported goods of subheading 2815.20 worth US$40m in 2024; the largest supplier was South Korea.
Questions and answers
What is the USA import duty for HTS code 2815.20.00?
The general duty in the Harmonized Tariff Schedule of the United States is free. 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 2815.20 as a whole, the largest supplier in 2024 was South Korea (US$14m), followed by Belgium.