Industrial Zinc Dust for Chemical Synthesis
High-grade zinc dust with 90%+ metallic content and fine particle distribution (<63 microns), employed as a reducing agent in organic synthesis reactions. Classified under 7903.90.60.00 per precise chapter definitions.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If marketed specifically for rubber compounding
Rubber-specific zinc dust has dedicated subheading 7903.90.30.
If in aqueous suspension or solution
Hydrides, nitrides, azides, or silicides of metals including zinc preparations under Chapter 28.
If for laboratory or industrial reagent kits
Zinc dust sold as prepared lab reagents or kits classifies as chemical goods in Chapter 38.
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Import Tips & Compliance
• Provide assay certificates confirming ≥85% zinc and vapor origin to CBP upon entry
• Use nitrogen-purged packaging to maintain reactivity during long-haul shipping
• Monitor for Section 301 tariffs if originating from China
Related Products under HTS 7903.90.60.00
Zinc Dust for Rubber Vulcanization
Fine zinc dust produced by condensing zinc vapor, used as an activator in rubber vulcanization processes. It meets chapter definitions with at least 85% metallic zinc and 80% of particles passing 63-micron sieve, classifying under 7903.90.60.00 as other zinc dust.
High-Purity Zinc Dust for Paint Pigments
Spherical zinc dust from vapor condensation, ideal for anti-corrosive paint formulations due to its fine particle size (<63 microns). Classified in 7903.90.60.00 as other zinc dust per chapter note (c) definitions.
Zinc Dust for Diamond Polishing Compounds
Ultra-fine zinc dust meeting chapter note (c) specs, used as a binder in diamond polishing slurries for gemstone and industrial diamond finishing. Falls under 7903.90.60.00 as other zinc dust/powders/flakes.
Metallic Zinc Dust for Pyrotechnics
Fine spherical zinc dust from zinc vapor condensation, containing ≥85% metallic zinc, used in pyrotechnic compositions for sparks and effects. HTS 7903.90.60.00 covers this as other zinc dust.