Mercuric Potassium Cyanide Crystals from Japan
Mercuric potassium cyanide (K2[Hg(CN)4]) is used in electroplating baths and as an intermediate in heavy metal separations. Explicitly named in HTS 2852.10.10.00 as a chemically defined complex cyanide of mercury and potassium. The double salt structure distinguishes it from simple mercuric cyanide.
Duty Rate — Japan → United States
10%
Rate breakdown
9903.03.0110%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
Import Tips
• Provide plating bath formulation sheets showing <0.1% free cyanide to qualify for reduced hazard shipping
• Include complex salt formation reaction documentation per Note 6 to Chapter 28 for double salts
• Pre-clear with BIS for dual-use chemical status under Commerce Control List Supplement No. 1