9902.10.45 - Conjugated linoleic acids ((9Z,11E)-9,11-octadecadienoic acid and (10E,12Z)-10,12-octadecadienoic acid) (CAS Nos. 2540-56-9 and 2420-56-6) (provided for in subheading 3823.19.40)

This HTS category, 9902.10.45, covers specific conjugated linoleic acids (CLAs), namely (9Z,11E)-9,11-octadecadienoic acid and (10E,12Z)-10,12-octadecadienoic acid, identified by CAS numbers 2540-56-9 and 2420-56-6 respectively. These are chemically defined isomers of linoleic acid with conjugated double bonds. While the official description notes they are "provided for in subheading 3823.19.40," this temporary legislation code signifies a specific, often temporary, modification or restriction applied to their import.

Unlike the primary HTS codes that classify goods based on their inherent nature and use (such as live animals in Chapters 1-5 or chemicals in Chapter 38), Chapter 99 codes are reserved for temporary legislation, trade agreement modifications, or specific import restrictions. Therefore, this category does not have direct siblings in the sense of representing alternative classifications for similar *types* of goods. Its distinction lies in its administrative function as a temporary measure, rather than a permanent classification of a commodity group.

As a leaf node, HTS code 9902.10.45 does not have further subcategories. Classification under this specific code indicates that the conjugated linoleic acids described are subject to the provisions outlined within Chapter 99, which may involve quotas, special duties, or other regulatory requirements beyond the standard customs duties applied to goods classified under permanent HTS headings. Importers must consult the full text of the legislation associated with this code to understand the precise conditions and any temporary restrictions.