Ammonium Tungstate Powder 99% Pure from Mexico
High-purity ammonium tungstate powder (99% assay) serves as a source for tungsten compounds in X-ray screens and phosphors. It is an ammonium salt of wolframic acid, directly matching the description of tungstates under this tariff item.
Duty Rate — Mexico → Canada
0%
Import Tips
• Include a certificate of analysis showing the 99% assay to support the declared value and classification
• If the powder is intended for phosphor manufacturing, note the end-use on the customs declaration
• Ensure the packaging is suitable for the product's hygroscopic nature to prevent quality issues during transport