3806.10.00.10 - Gum rosin

This category specifically covers **gum rosin**, which is the solid resin obtained from pine trees and other coniferous plants. It is the natural, unmodified resin, characterized by its characteristic odor and brittle, glassy fracture when cool. Gum rosin is primarily composed of resin acids, such as abietic acid and its isomers. Its primary use is as a raw material in the production of adhesives, inks, varnishes, paper sizing, and in various industrial applications.

Within the broader heading of "Rosin and resin acids, and derivatives thereof; rosin spirit and rosin oils; run gums," this sub-heading distinguishes natural gum rosin from other forms of rosin and related materials. While other subheadings might cover modified rosins, derivatives, or byproducts, 3806.10.00.10 is exclusively for the unadulterated natural resin extracted directly from living trees. It is important to differentiate this from "Other" rosins or resin acids covered under sibling category 3806.10.00.50, which would encompass processed or modified rosins, or other resin acids not derived directly as gum rosin.

As this classification represents a leaf node, there are no further subcategories. Therefore, the focus for classification under this code is on the direct identification of gum rosin based on its natural origin and unmodified state. Classification decisions should verify that the product is indeed derived from the exudates of coniferous trees and has not undergone significant chemical or physical modification beyond initial processing to remove impurities.