Mercuric Potassium Cyanide Crystals from Mexico
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 — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 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