Tungsten Magnéli Phase Oxide (W18O49) from Mexico
Tungsten Magnéli phase oxide (W18O49) is a non-stoichiometric tungsten suboxide used in electrochromic windows and field emission displays. Despite its non-stoichiometric composition, it is considered a chemically defined tungsten oxide under Chapter 28. It is classified under tariff item 2825.90.00 as 'Other' metal oxides.
Duty Rate — Mexico → Canada
0%
Import Tips
• Provide a technical datasheet confirming the W18O49 composition and its intended use to support classification
• Verify whether the product meets the definition of a separate chemically defined compound under Chapter 28 Note 1
• Consult the CBSA if uncertain about the duty rate, as non-stoichiometric oxides may require additional review