Nano Calcium Carbonate
Nano-sized calcium carbonate particles (1-100 nm) produced via precipitation for high-performance applications, classified as calcium carbonate under HTS 2836.50.00.00. Used in tire rubber reinforcement, coatings, and advanced composites.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If surface-modified for dispersion
Chemically modified nanoparticles become prepared binders or additives under preparations.
If doped with hydrogen peroxide
Peroxide-stabilized versions fall under Chapter 28 peroxides per chapter notes.
If used as rubber accelerator preparation
Formulated rubber compounding ingredients shift to Chapter 38.
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Import Tips & Compliance
• Include SEM/TEM analysis proving nanoscale dimensions to justify premium classification
• Declare surface treatment agents separately if >5% by weight to avoid mixture reclassification
• Comply with TSCA pre-notice for novel nanomaterials entering US commerce
Related Products under HTS 2836.50.00.00
Precipitated Calcium Carbonate (PCC)
Precipitated calcium carbonate is a fine, white powder produced by chemical precipitation from calcium hydroxide and carbon dioxide, classified under HTS 2836.50.00.00 as chemically defined calcium carbonate. It is widely used as a filler in paper, plastics, and paints to enhance brightness and opacity.
Ground Calcium Carbonate (GCC) Powder
Ground calcium carbonate is a micronized powder derived from high-purity limestone, meeting the definition of calcium carbonate under HTS 2836.50.00.00 when chemically processed. Used in pharmaceuticals, food supplements, and as an antacid.
Pharmaceutical Grade Calcium Carbonate USP
USP-grade calcium carbonate meeting pharmacopeia standards for purity and microbial limits, classified under HTS 2836.50.00.00 as chemically defined compound. Primary ingredient in antacids like Tums and calcium supplements.
Food Grade Calcium Carbonate E170
E170 food additive calcium carbonate used as acidity regulator, anticaking agent, and nutrient source, classified under HTS 2836.50.00.00. Meets FCC standards for direct food contact applications.
Calcium Carbonate Filler Masterbatch
Masterbatch containing 70-80% calcium carbonate dispersed in polymer carrier, but classified under HTS 2836.50.00.00 when imported as chemical concentrate. Used for plastics compounding to reduce costs.
Heavy Calcium Carbonate 1250 Mesh
Ultra-fine heavy calcium carbonate (D97<4.5μm) from marble grinding, classified under HTS 2836.50.00.00 for industrial filler applications. Used in PVC pipes, masterbatches, and powder coatings.