Sodium Paratungstate Pentahydrate from Canada
Sodium paratungstate pentahydrate (Na10W12O42·5H2O) is an isopolyoxotungstate used in metal finishing, classified in HTS 2841.80.00. It forms protective conversion coatings.
Duty Rate — Canada → United States
5.5%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Tungsten content assay (>70% WO3) confirms paratungstate identity
• Hazardous for skin contact; proper GHS labeling mandatory
• Plating bath chemical needs wastewater treatment declarations