2914.40.20.00 - 1,2,3-Indantrione monohydrate (Ninhydrin)

This HTS classification, specifically 2914.40.20.00, covers 1,2,3-Indantrione monohydrate, commonly known as Ninhydrin. Ninhydrin is an organic chemical compound characterized by its indane ring structure with three ketone groups and a hydrate molecule. It is primarily recognized for its application in analytical chemistry, particularly for the detection and quantification of amino acids, amines, and ammonia due to its characteristic purple coloration upon reaction.

Within the broader category of "Ketones and quinones, whether or not with other oxygen function, and their halogenated, sulfonated, nitrated, or nitrosated derivatives," this specific subheading distinguishes itself by focusing on a unique compound. While other ketones and quinones are covered under this chapter, 2914.40.20.00 is reserved for the specific chemical entity of 1,2,3-Indantrione monohydrate. Its sibling category, 2914.40.40.00, designated as "Other," would encompass aromatic ketones and quinones that do not specifically fall under the Ninhydrin classification.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Therefore, the classification for 1,2,3-Indantrione monohydrate (Ninhydrin) is definitive at this level, requiring direct identification of the substance itself for correct customs declaration and duty assessment.