Ammonium Metatungstate from Germany
Ammonium metatungstate ((NH4)6H2W12O40) is an ammonium salt of a peroxometallic tungstic acid complex, widely used in catalysts and tungsten metal production. Classified under HTS 2841.90.50.00 as 'other' salts of oxo- or peroxometallic acids. It qualifies as chemically defined per Chapter 28/29 notes.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Provide detailed chemical assay confirming metatungstate structure to distinguish from simple tungstates in 2841.80
• Check for REACH compliance if transshipping from EU; pitfall is incorrect declaration as 'tungsten compound' leading to wrong heading
• Use UN-approved packaging for powder form to prevent dust hazards during transport