Natural Phosphatic Chalk Lumps from Mexico
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.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• 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