2913.00 - Halogenated, sulfonated, nitrated or nitrosated derivatives of products of heading 2912:

This HTS category, 2913.00, encompasses halogenated, sulfonated, nitrated, or nitrosated derivatives of products primarily classified under heading 2912. Heading 2912 covers aldehydes, whether or not with other oxygen function, and cyclic aldehydes, which are organic compounds characterized by the presence of an aldehyde functional group (-CHO). Therefore, 2913.00 is for derivatives of these aldehydes where hydrogen atoms have been substituted by halogens (fluorine, chlorine, bromine, iodine), sulfonyl groups (-SO2-), nitro groups (-NO2), or nitroso groups (-NO).

This classification is distinct from other categories within Chapter 29, which deal with various classes of organic compounds. For instance, it differentiates itself from heading 2912 by specifically focusing on modified forms of aldehydes and their cyclic counterparts, not the aldehydes themselves. Furthermore, it's crucial to distinguish these derivatives from other halogenated, sulfonated, nitrated, or nitrosated organic compounds that are not derived from products of heading 2912. The defining characteristic is the parent compound being an aldehyde or cyclic aldehyde.

The subcategories within 2913.00 provide further refinement based on the specific structural characteristics and functional groups of these derivatives. The distinction between "Aromatic" derivatives and those falling under "VI. KETONE-FUNCTION COMPOUNDS AND QUINONE-FUNCTION COMPOUNDS" highlights the presence of an aromatic ring system or ketone/quinone functionalities, respectively, in addition to the halogenation, sulfonation, nitration, or nitrosation. The residual category, "Other," captures any remaining derivatives that do not fit into these more specific subdivisions.