Copper Vitriol Blue Crystals from United States
Copper vitriol blue crystals are the traditional name for hydrated copper sulfate pentahydrate. Despite the historical term, the product is a chemically defined compound (CuSO4·5H2O) and is classified under this tariff item as a sulfate of copper, not as a pigment or dye.
Duty Rate — United States → Canada
0%
Import Tips
• Do not describe the product as a pigment on customs documents, as that may lead to misclassification under Chapter 32
• Provide the chemical name and CAS number to CBSA to confirm it is copper sulfate pentahydrate
• If used in dyeing, ensure it is not mixed with other substances that could change its classification