Whole hops and hop pellets are classified under heading 1210, which covers hop cones whether or not ground or powdered. Hop extracts and saps — where the active compounds have been concentrated through solvent, CO₂, or other extraction processes — fall under 1302130000. The key classification criterion is whether the product is a mechanical reduction of the cone (pellets) or a chemical/physical extraction of the active constituents (extract). Misclassification between these headings is a common audit finding for brewing-ingredient importers.

Commercial invoices should specify the extraction method (e.g., CO₂, ethanol, isomerization), alpha-acid content, and intended use (brewing, flavoring, pharmaceutical). Certificates of analysis from the exporting manufacturer are standard practice and support both CBP classification and FDA food-additive compliance review. For isomerized alpha-acid products used in brewing, brewers may also require documentation of compliance with TTB regulations governing beer ingredients.