2919.90.15.00 - Triphenyl phosphate

This HTS subheading, 2919.90.15.00, specifically classifies triphenyl phosphate. Triphenyl phosphate is an organic chemical compound belonging to the phosphoric ester family. It is primarily utilized as a plasticizer in polymers such as cellulose acetate, cellulose nitrate, and PVC, imparting flexibility and durability. It also finds applications as a flame retardant and a hydraulic fluid.

The distinction from sibling categories, such as 2919.90.25.00 ("Other"), lies in the specific chemical identity. While other phosphoric esters and their derivatives might fall under the broader "Other" category, this subheading is reserved exclusively for triphenyl phosphate due to its distinct chemical structure and widespread commercial use as a plasticizer. The classification focuses on the chemical composition and its primary functional application.

As this is a leaf node within the HTS structure, there are no further subcategories for triphenyl phosphate. Therefore, classification within this subheading is determined by the definitive identification of the substance as triphenyl phosphate, satisfying the preceding hierarchical classifications for phosphoric esters, aromatic compounds, and plasticizers.