Ammonium Paratungstate from China
Ammonium paratungstate (APT) is a white crystalline powder with the formula (NH4)10[H2W12O42]·4H2O, used primarily as an intermediate in the production of tungsten metal and tungsten carbide. As an ammonium salt of tungstic acid in its paratungstate form, it is classified as a tungstate under this tariff item.
Duty Rate — China → Canada
0%
Import Tips
• Provide the exact chemical formula and purity certificate to support classification as a chemically defined tungstate
• If importing for tungsten metal production, note the end-use on the customs declaration to avoid delays
• Confirm whether the product is subject to any export controls in the country of origin that may affect shipping