Siliceous Fossil Meals and Diatomite

This HS code covers siliceous fossil meals and similar siliceous earths, including products like diatomite, kieselguhr, and tripolite. These materials can be either calcined or uncalcined and have an apparent specific gravity of 1 or less. A common product sourced under this code is food-grade diatomite used as a natural filter aid in beverage production.

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