Tungsten Nitride WN Powder
Tungsten nitride (WN) powder serves as a diffusion barrier in semiconductor manufacturing and decorative coatings. It qualifies for HTS 2850.00.10.00 as a chemically defined nitride of tungsten, not a carbide. The material offers high hardness and corrosion resistance.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If co-precipitated with carbon forming WC/WN complex
Dual carbide-nitride compounds excluded to heading 2849 per chapter exclusions.
If nitride of other metals like titanium or zirconium
Subheading 2850.00.10 specifically limits to tungsten; others go to residual 2850.00.90.
If in nanoparticle suspension for CVD applications
Prepared chemical dispersions not purely chemically defined classify in Chapter 38.
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Import Tips & Compliance
• Include nitrogen content certification (>10% wt) to distinguish from pure tungsten metal
• Declare as UN3077 environmentally hazardous if particle size <100μm per IMDG regulations
• Watch for anti-dumping duties on Chinese-origin refractory metal compounds
Related Products under HTS 2850.00.10.00
Tungsten Silicide Powder
Tungsten silicide (WSi2) is a refractory intermetallic compound used in microelectronics for gate electrodes and low-resistivity VLSI components. It falls under HTS 2850.00.10.00 as a chemically defined silicide of tungsten, distinct from carbides in heading 2849. The product is typically supplied as a fine gray powder for high-temperature applications.
Tungsten Boride WB2
Tungsten diboride (WB2) is an ultra-hard ceramic material used in wear-resistant coatings and cutting tools. Classified under HTS 2850.00.10.00 as a boride of tungsten, meeting chemically defined criteria. It exhibits high melting point and chemical stability for extreme environments.
Tungsten Hydride WH Powder
Tungsten hydride powder functions as a hydrogen storage material and catalyst precursor in chemical synthesis. It is classified under HTS 2850.00.10.00 as a hydride of tungsten per the heading scope for chemically defined compounds. The metastable compound decomposes at moderate temperatures.
Sodium Tungsten Borohydride
Sodium tungsten borohydride serves as a reducing agent in organic synthesis and fuel cell research. As a chemically defined boride complex of tungsten, it falls under HTS 2850.00.10.00, distinguished from simple salts by chapter note 6 on complex compounds. Typically white crystalline powder soluble in polar solvents.
Tungsten Azide W(N3)6
Tungsten hexakis(azide) is an energetic material used in pyrotechnics and airbag initiators. It classifies under HTS 2850.00.10.00 as a chemically defined azide of tungsten. The air-stable crystalline compound offers high detonation velocity.
Tungsten Silicide Sputtering Target
High-purity tungsten silicide sputtering targets deposit thin films for CMOS gates in semiconductors. As unworked silicide of tungsten, classified HTS 2850.00.10.00 before fabrication into wafers. Supplied as disc or rectangular blocks >99.9% pure.