Copper Vitriol Blue Crystals from China
Traditional name for hydrated copper sulfate pentahydrate, used in pigments and dyes. Classified under 2833.25.00.00 as sulfate of copper; historical vitriol but modern chemical definition applies. Deep blue color from Cu2+ ions.
Duty Rate — China → United States
26.4%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 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(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Disclose traditional names on invoice alongside chemical formula to prevent confusion
• Test for arsenic impurities common in natural vitriol sources
• Label with GHS hazard pictograms for skin/eye irritant and aquatic toxicity