Commercial Cobalt Tetroxide for Porcelain Glazes from United States
Commercial-grade Co3O4 powder formulated for blue coloration in ceramic glazes and porcelain enamels is a commercial cobalt oxide. The tariff item explicitly covers commercial cobalt oxides, and it meets Chapter 28's scope. The chapter notes do not exclude it.
Duty Rate — United States → Canada
0%
Import Tips
• Provide a certificate of analysis showing the Co3O4 content and impurities to confirm it qualifies as commercial grade
• If used in glazes, declare the end use
• Keep records of the production process to support classification