Propylene Copolymers in Primary Forms

The classification turns on which monomer predominates by weight. If propylene is the dominant monomer and ethylene (or another alpha-olefin) is the minor comonomer, the material falls under heading 390230. If ethylene predominates, the material is more likely classified under heading 390140. Supplier certificates of composition specifying monomer weight percentages are essential supporting documentation.

While the resin itself enters as an industrial chemical, downstream converters using it for food-contact packaging must comply with FDA regulations governing indirect food additives (21 CFR). Importers supplying converters should request supplier declarations confirming that the resin formulation — including additives and stabilizers — is compliant with applicable FDA food-contact regulations for the intended use.