2815.20.00.90
Potassium hydroxide (Caustic potash) / Other
Classification path
- Sodium hydroxide (Caustic soda); potassium hydroxide (Caustic potash); peroxides of sodium or potassium
- Potassium hydroxide (Caustic potash)
- Other
Rates of duty
- General (MFN)
- Free
- Column 2Cuba, North Korea, Russia, Belarus
- 2.2¢/kg
- Unit of quantity
- kg
Related lines in heading 2815
About heading 2815
Sodium hydroxide (Caustic soda); potassium hydroxide (Caustic potash); peroxides of sodium or potassium
Heading 2815 covers sodium hydroxide (caustic soda), potassium hydroxide (caustic potash), and the peroxides of sodium or potassium. It is split by chemical and, for the hydroxides, by physical form: solid versus aqueous solution. The two hydroxide families enter free, while the peroxides carry a 3.7% general (MFN) rate.
Full guide to heading 2815Products in this heading
- Caustic soda flakes (solid sodium hydroxide)
- Caustic soda pearls or granules
- Liquid soda lye, a water solution of sodium hydroxide
- Caustic potash flakes (solid potassium hydroxide)
- Potassium hydroxide solution
- Sodium peroxide
- Potassium peroxide
Frequently asked questions
What is the HTS code for solid caustic soda?
Solid sodium hydroxide is classified under 2815.11.00.00, with a general (MFN) rate of Free.
What is the duty on sodium hydroxide in aqueous solution?
Sodium hydroxide in aqueous solution (soda lye or liquid soda) enters under 2815.12.00.00 at a general (MFN) rate of Free.
How do I classify peroxides of sodium or potassium?
Peroxides of sodium or potassium are classified under 2815.30.00.00, which carries a general (MFN) rate of 3.7%. Solid potassium hydroxide goes under 2815.20.00.50 and other potassium hydroxide under 2815.20.00.90, both at a general (MFN) rate of Free.
Source: USITC Harmonized Tariff Schedule, retrieved October 22, 2026.