Yes, carbon black has been the subject of antidumping duty investigations and orders targeting imports from specific countries. Importers should check the current scope of any active orders with the Department of Commerce and US International Trade Commission before sourcing, as duty liability can be substantial and retroactive through the liquidation process.

Carbon black is an amorphous form of carbon produced by combustion or pyrolysis and lacks the crystalline structure of graphite. Graphite — whether natural or artificial — is classified under heading 2504 or 3801 respectively. The key distinction is crystalline structure and production method: carbon black's disordered microstructure and nanoscale particle size set it apart from graphitic carbons.