Silica Glass Microspheres (Fused Quartz) from United States
Synthetic fused silica glass microspheres ranging from 1 to 20 microns, used in semiconductor polishing slurries. Per chapter note 5, 'glass' includes fused quartz and other fused silica, and the diameter is under 1 mm, so they fall under tariff item 7018.20.00.
Duty Rate — United States → Canada
0%
Import Tips
• Confirm that the fused silica meets the definition of 'glass' under chapter note 5, which includes fused quartz
• Provide a technical datasheet showing the particle size distribution to verify the under-1-mm diameter
• Ensure the microspheres are not mixed with polishing compounds that could change classification