Cobalt(II,III) Oxide (Co3O4) from Mexico
Cobalt(II,III) oxide (Co3O4), also known as tricobalt tetraoxide, is an olive-black powder used in battery cathodes and pigments. It is a separate chemically defined compound of cobalt, meeting Chapter 28's criteria. The tariff item explicitly includes cobalt oxides, and this product is not excluded by the chapter's legal notes.
Duty Rate — Mexico → Canada
0%
Import Tips
• Provide a certificate of analysis showing the Co3O4 purity and absence of impurities that might shift classification
• If the product is for battery use, note this on the customs declaration
• Keep records of the manufacturing process to support the chemically defined status