Christmas Island Phosphate Rock
Raw, unground phosphate rock from Christmas Island guano deposits, high in P2O5. HTS 2510.10.00.00 applies to this natural calcium phosphate in lump form for phosphate chemical industry.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If guano with low phosphate
Guano or earth colors with minor phosphates fall under heading 2530.
If potassic fertilizer blend
Potash-based fertilizer mixes including phosphates go to heading 3104.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Document guano-derived origin but confirm >70% phosphate to avoid mineral mixtures
• Use heavy-duty bulk bags to maintain lump integrity during ocean freight
• Pre-clear with CBP on radioactivity if from certain island deposits
Related Products under HTS 2510.10.00.00
Unground Florida Pebble Phosphate Rock
Natural calcium phosphate rock mined from Florida deposits, unground and in its raw form with less than 4% magnesium oxide content. Classified under HTS 2510.10.00.00 as unground natural calcium phosphates, suitable for fertilizer production or further processing. It consists primarily of apatite minerals and meets the criteria for unprocessed phosphatic rock.
Raw Moroccan Phosphate Ore
Unground phosphate rock from Moroccan mines, primarily sedimentary apatite with high P2O5 content. Falls under HTS 2510.10.00.00 as natural calcium phosphates in unprocessed, unground form for use in phosphoric acid or fertilizer manufacturing.
Natural Phosphatic Chalk Lumps
Unground lumps of phosphatic chalk, a soft calcareous material containing natural calcium phosphates. HTS 2510.10.00.00 covers this as unground phosphatic chalk, used in soil amendment or animal feed supplements.
Tennessee Brown Rock Phosphate
Unground brown rock phosphate from Tennessee deposits, rich in natural apatite for organic farming applications. Classified in HTS 2510.10.00.00 as unground natural calcium phosphates, ideal for direct soil application.
Nauru Island Unground Phosphorite
Unground phosphorite ore from Nauru raised atolls, a premium natural calcium phosphate source. Fits HTS 2510.10.00.00 for unprocessed phosphatic rock used in high-purity phosphoric acid production.