Stabilized Calcium Cyanide Briquettes for Mining from Mexico
Calcium cyanide briquettes are compressed and stabilized forms designed for easy dissolution in mining leach tanks for gold cyanidation. Falls under HTS 2837.19.01.15 as calcium cyanide, distinguished from dithionites/sulfoxylates in 2831 which require organic stabilization. The briquette form does not alter its chemical classification as a simple cyanide.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Ensure briquettes meet UN 1647 specs for calcium cyanide; declare exact stabilization agents
• Common pitfall: undervaluation due to weight of binders