Phosphotungstic Acid Sodium Salt from Germany
Sodium phosphotungstate (Na3PW12O40) is a white crystalline powder used in analytical chemistry for protein precipitation and as a reagent in microscopy. Despite containing a phosphate group, it is classified as a tungstate because the tungsten-oxygen framework dominates its structure and function.
Duty Rate — Germany → Canada
0%
Import Tips
• Ensure the product is clearly labelled as a chemically defined tungstate salt with its CAS number on the commercial invoice
• If the phosphate content is significant, consider requesting an advance ruling from the CBSA to confirm classification
• Keep technical data sheets showing the tungsten content to support the tariff classification