Spherical Zinc Dust for Diamond Polishing
Ultra-fine spherical zinc dust obtained from zinc vapor condensation, used in diamond polishing compounds. Meets HTS 7903.90.30.00 zinc dust definition with 90%+ particles passing 63-micron sieve and 97% metallic zinc purity.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If supplied as ready polishing compound
Interchangeable tools including zinc-based polishes classify under Chapter 82.
If hydrogen-reduced rather than vapor condensed
Different production methods may shift to artificial graphite or preparations.
If containing over 2.5% other elements
Zinc alloys exceeding alloy threshold classify under 7901.20.
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Import Tips & Compliance
• Require sieve analysis certificates compliant with chapter note (c) for 63-micron requirement
• Declare exact metallic zinc percentage (>85%) to prevent downgrading to waste materials
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