Harmonized System
Section VI > Chapter 28 > Heading 2811 > 2811.1 > 2811.11
Hydrogen fluoride (hydrofluoric acid)
Section VI > Chapter 28 > Heading 2811 > 2811.1 > 2811.12
Hydrogen cyanide (hydrocyanic acid)
Section VI > Chapter 28 > Heading 2811 > 2811.2 > 2811.21
Carbon dioxide
Section VI > Chapter 28 > Heading 2811 > 2811.2 > 2811.22
Silicon dioxide
Section II > Chapter 9 > Heading 0906 > 0906.1
Neither crushed nor ground
Section II > Chapter 9 > Heading 0906 > 0906.1 > 0906.11
Cinnamon (Cinnamomum zeylanicum Blume)
Section II > Chapter 9 > Heading 0906 > 0906.20
Crushed or ground