Seaweeds & Other Algae Not Fit for Human Consumption

Industrial seaweeds under 121229 are primary inputs for hydrocolloid manufacturers producing carrageenan, agar, and alginate — ingredients widely used as gelling, thickening, and stabilizing agents in food processing, pharmaceutical tablet coatings, and cosmetic formulations. Agricultural applications such as soil conditioners and biostimulants are also growing end uses.

Commercial invoices and product specifications should clearly state the industrial or technical grade of the material and its intended downstream processing use (e.g., hydrocolloid extraction). If the product has been treated with preservatives or processed in a way that renders it inedible, that should be noted. Ambiguous cases — such as food-grade species sold in bulk for industrial use — may require a binding ruling from CBP to confirm the correct heading.