High-Purity Ammonium Paratungstate Pentahydrate from Canada
99.9% pure ammonium paratungstate pentahydrate (APT·5H2O) for semiconductor precursor applications. Meets strict chemically defined standards for HTS 2841.80.0010 classification.
Duty Rate — Canada → United States
5.5%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• ICP-MS analysis required for trace metal certification
• Cleanroom packaging specifications for electronics import
• Confirm no organic stabilizers present