Ammonium Wolframate Crystals from Mexico
Ammonium wolframate crystals are a metatungstate form used in photographic chemicals and corrosion inhibitors. As a defined inorganic salt of tungsten, it precisely fits the tungstates heading under this tariff item.
Duty Rate — Mexico → Canada
0%
Import Tips
• Use the term 'ammonium tungstate' on the customs documentation, as 'wolframate' may cause confusion with the CBSA
• Provide the crystal size distribution if relevant to the product's end-use
• Keep records of the manufacturing process to demonstrate the product is a chemically defined compound