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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If primarily calcium carbonate
Non-phosphatic chalk or high-calcium variants are chemical preparations under Chapter 28.
If calcined or heat-processed
Kieselguhr or calcined diatomite/chalk falls under heading 2512.
If blended with other fertilizers
Mixtures of animal/vegetable fertilizers with phosphates classify under heading 3101.
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Import Tips & Compliance
• Include particle size verification (>0.5mm average) to prove unground status against statistical notes
• Label shipments clearly as 'phosphatic chalk' to distinguish from pure calcium carbonate under heading 2836
• Comply with agricultural import regs if destined for feed use, including pathogen testing
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.
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.
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.
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.