High-Phosphorus Phosphor Copper CuP15 from Japan
CuP15 grade phosphor copper is a chemically defined phosphide with over 15% phosphorus content, primarily used as a deoxidizer in copper and bronze casting to remove oxygen and improve fluidity. It falls under HTS 2853.90.10.00 per heading 2853 which explicitly includes copper phosphide (phosphor copper) exceeding 15% phosphorus by weight. Supplied as irregular lumps or waffles for metallurgical addition.
Duty Rate — Japan → United States
2.6%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Include spectrographic analysis certificates proving phosphorus >15%; declare as phosphide compound to avoid Chapter 74 reclassification
• Watch for REACH/ TSCA compliance on phosphorus compounds