Nepheline Syenite Ceramic Flux
Calcined nepheline syenite flux for porcelain and sanitary ware production, providing alkali metal oxides for vitrification. Classified HTS 2529.30.0050 as 'other' nepheline syenite despite heat treatment, remaining a natural mineral product. Typical Na2O 9-11%, Al2O3 22-24%.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If alkali metal silicates extracted
Chemical compounds of silicates fall under Chapter 28, not natural minerals.
If formed into refractory shapes
Shaped refractories classify in Chapter 69, not raw flux materials.
If primarily fluorspar contaminated
High fluoride content shifts to fluorspar heading 2529.22 per mineral dominance.
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Import Tips & Compliance
• Chemical analysis certificates mandatory showing fluxing oxides within natural nepheline ranges
• Distinguish from synthetic feldspar substitutes (HTS 2839) via XRF spectrometry reports
• Bulk shipments >20mt require vessel residue certificates to avoid contamination penalties
Related Products under HTS 2529.30.00.50
Nepheline Syenite Powder
Finely ground nepheline syenite used as a functional filler in ceramic tile production and glass manufacturing. Classified under HTS 2529.30.0050 as 'other' leucite, nepheline and nepheline syenite that is processed into powder form but remains a natural mineral product. It provides fluxing properties and improves whiteness in end products.
Leucite Ore Concentrate
Concentrated leucite mineral extracted from volcanic rock deposits, used primarily in potassium fertilizer production and ceramics. Falls under HTS 2529.30.0050 as 'other' leucite not in crude form. The concentrate maintains natural mineral composition without synthetic additives.
Ground Nepheline Syenite Filler
Micronized nepheline syenite specifically graded for paint and coating applications as an extender pigment. HTS 2529.30.0050 covers this 'other' form of nepheline syenite processed by grinding but not chemically altered. Provides matting effect and abrasion resistance.
Leucite Ceramic Raw Material
Natural leucite crystals separated for specialty glass-ceramics like cooktop panels and dental porcelains. HTS 2529.30.0050 'other' covers beneficiated leucite maintaining crystalline structure. Provides nucleation sites for controlled crystallization.
Nepheline Syenite Glass Batch Additive
Granulated nepheline syenite for container glass and flat glass production, replacing soda ash and feldspar. HTS 2529.30.0050 classification as 'other' nepheline syenite in prepared batch form. Standardized 0.5-3mm granules optimize melting efficiency.
Milled Leucite for Porcelain
Ultra-fine milled leucite (<10 micron D50) for high-strength dental porcelain and technical ceramics. Remains HTS 2529.30.0050 'other' as physical milling doesn't alter mineralogy. Enhances translucency and strength in final frits.