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
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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