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3810.90.20.00/Sodium Cyanide Silver Soldering Flux/Mexico

Sodium Cyanide Silver Soldering Flux from Mexico

Anhydrous sodium cyanide-based flux for silver soldering jewelry and electronics. Inorganic salts dissolve oxides at soldering temperatures, fitting 3810.90.2000 for wholly inorganic auxiliary preparations. Highly toxic, used in precision assembly.

Duty Rate — Mexico → United States

10%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• EPA TSCA pre-notification mandatory for cyanide compounds; expect delays

• Ship as hazardous material (UN 1689) with antidote kits documented