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.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | +17.5% | 17.5% |
| 🇲🇽Mexico | Free | +10.0% | 10% |
| 🇨🇦Canada | Free | +10.0% | 10% |
| 🇩🇪Germany | Free | +10.0% | 10% |
| 🇯🇵Japan | Free | +10.0% | 10% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If a complex cyanide oxide
Cyanide oxides are separated in 2842.10, distinct from pure cyanides per the heading structure.
If fluorine-contaminated
Fluorine and iodine compounds take precedence; any significant halogen content shifts to Chapter 28 subchapter II.
If supported on catalysts for industrial use
Supported catalysts with cyanides are classified in 3815, not as pure compounds.
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Import Tips & Compliance
• Comply with DOT hazardous material regulations (Class 6.1 poison); include Material Safety Data Sheets (MSDS) in shipments
• Watch for reclassification if granules contain >5% impurities
Related Products 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.
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.