Ammonium Paratungstate from Japan
Ammonium paratungstate ((NH4)10[H2W12O42]·4H2O) is a key intermediate salt in tungsten processing, fitting HTS 2841.80.0050 as an 'other' tungstate salt. It is thermally decomposed to produce tungsten oxide for further metal refinement.
Duty Rate — Japan → United States
5.5%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Provide detailed chemical composition to distinguish from ammonium metatungstate
• Comply with REACH-like regulations for ammonium compounds in import docs
• Watch for bulk vs packaged forms; retail packs may shift to 2842 if complex