Phosphotungstic Acid Sodium Salt from China
Sodium phosphotungstate is a complex tungstate salt used in analytical chemistry for protein precipitation. Despite containing phosphate, it is classified as a tungstate under heading 28.41 due to its tungstate core structure.
Duty Rate — China → Canada
0%
Import Tips
• Confirm the product is a single chemically defined compound, not a mixture
• Provide the molecular formula and hydration state
• Ensure the product is not classified as a heteropolyacid, which might fall under other headings