Hemimorphite Zinc Silicate Concentrate from Mexico
Flotation concentrate of hemimorphite (Zn4Si2O7(OH)2·H2O), a zinc silicate ore averaging 42% zinc. Classified in HTS 2608.00.0030 under zinc ores and concentrates, with zinc content statistically noted. Used in specialized leaching processes for zinc.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Conduct particle size analysis if coarse (>4.75mm per related notes); ensure silica content doesn't trigger silica dust regs
• File with detailed chemical composition report
• Watch for misdeclaration as silica products