Copper Phosphide (Phosphor Copper) from Mexico
Copper phosphide, containing more than 15% phosphorus by weight, used in metallurgy for deoxidizing and alloying. Classified under HTS 2853.90.90 as per Chapter Note 7, which explicitly includes it in heading 2853. It is an inorganic compound of phosphorus and copper, not chemically excluded.
Duty Rate — Mexico → United States
2.8%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Verify phosphorus content exceeds 15% with lab certification to confirm classification under 2853 per Chapter Note 7
• Include Material Safety Data Sheets (MSDS) due to phosphide reactivity; ensure DOT-compliant packaging
• Avoid misclassification as copper alloys (7403); chemically defined phosphides stay in Chapter 28