Harmonized System
Section VI > Chapter 29 > Heading 2911 > 2911.00
Acetals and hemiacetals, whether or not with other oxygen function, and their halogenated, sulphonated, nitrated or nitrosated derivatives
Section VI > Chapter 29 > Heading 2912
Aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde.
Section VI > Chapter 29 > Heading 2912 > 2912.1
Acyclic aldehydes without other oxygen function
Section VI > Chapter 29 > Heading 2912 > 2912.2
Cyclic aldehydes without other oxygen function
Section VI > Chapter 29 > Heading 2912 > 2912.4
Aldehyde-alcohols, aldehyde-ethers, aldehyde-phenols and aldehydes with other oxygen function
Section VI > Chapter 29 > Heading 2912 > 2912.1 > 2912.11
Methanal (formaldehyde)
Section VI > Chapter 29 > Heading 2912 > 2912.1 > 2912.12
Ethanal (acetaldehyde)