Stabilized Calcium Cyanide Briquettes for Mining from China
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 — China → United States
20%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.157.5%Except as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(r) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(s)
Import Tips
• Ensure briquettes meet UN 1647 specs for calcium cyanide; declare exact stabilization agents
• Common pitfall: undervaluation due to weight of binders