High-Purity Ammonium Paratungstate Pentahydrate from Mexico
99.9% pure ammonium paratungstate pentahydrate (APT·5H2O) is a high-purity intermediate for semiconductor precursor applications. It meets strict chemically defined standards for classification as a tungstate under this tariff item.
Duty Rate — Mexico → Canada
0%
Import Tips
• Provide a certificate of analysis showing the 99.9% purity and the pentahydrate form to support the declared value
• If the product is for semiconductor applications, note the end-use on the customs declaration
• Consider using a customs broker familiar with chemical imports to ensure accurate classification