Calcium cyanide
Cyanides, cyanide oxides and complex cyanides: > Cyanides and cyanide oxides: > Other > Calcium cyanide
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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)
Products classified under HTS 2837.19.01.15
Calcium Cyanide Ca(CN)2 Powder
Calcium cyanide, chemical formula Ca(CN)2, is a white crystalline powder used primarily in gold mining for extracting gold from ore via the cyanidation process. It falls under HTS 2837.19.01.15 as a chemically defined cyanide of an inorganic base (calcium), specifically classified as calcium cyanide. This subheading covers other cyanides excluding sodium cyanide.
Industrial Grade Calcium Cyanide Granules
Granular calcium cyanide is an industrial chemical employed in froth flotation processes for mineral extraction, particularly silver and gold recovery. Classified under HTS 2837.19.01.15 as 'other' cyanides, specifically calcium cyanide, meeting Chapter 28 definitions for chemically defined inorganic compounds. It is stabilized for safe handling in mining operations.
High-Purity Calcium Cyanide for Laboratory Use
Laboratory-grade calcium cyanide is a high-purity form (99%+) used in analytical chemistry for qualitative and quantitative testing of cyanide reactions. It is explicitly classified under HTS 2837.19.01.15 as calcium cyanide, a simple inorganic cyanide fitting Chapter 28 Note 2 exclusions for organo-inorganic compounds. Supplied in small, sealed containers for research safety.
Stabilized Calcium Cyanide Briquettes for Mining
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.
Technical Grade Calcium Cyanide Flakes
Technical grade calcium cyanide flakes are produced for electroplating baths and metal hardening processes in industrial applications. Classified in HTS 2837.19.01.15 as 'other' cyanides, specifically calcium cyanide, adhering to Chapter 28's scope for inorganic cyanides of bases. Flakes offer better solubility than powder forms.
Calcium Cyanide 70% Technical Solution Precursor
70% calcium cyanide technical grade is a concentrated form used as a precursor for on-site solution making in remote mining sites. It is squarely under HTS 2837.19.01.15 for calcium cyanide, as a chemically defined compound per subheading note, not a preparation. Purity ensures classification remains in Chapter 28.