Harmonized System
Section VI > Chapter 28 > Heading 2814
Ammonia, anhydrous or in aqueous solution.
Section VI > Chapter 28 > Heading 2814 > 2814.10
Anhydrous ammonia
Section VI > Chapter 28 > Heading 2814 > 2814.20
Ammonia in aqueous solution
Section VI > Chapter 28 > Heading 2815
Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium.
Section VI > Chapter 28 > Heading 2815 > 2815.1
Sodium hydroxide (caustic soda)
Section VI > Chapter 28 > Heading 2815 > 2815.1 > 2815.12
In aqueous solution (soda lye or liquid soda)
Section VI > Chapter 28 > Heading 2815 > 2815.20
Potassium hydroxide (caustic potash)
Section VI > Chapter 28 > Heading 2815 > 2815.30
Peroxides of sodium or potassium
Section VI > Chapter 28 > Heading 2816
Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium.