Tungsten Oxychloride WCl4O from China
Tungsten oxychloride (WCl4O) is a volatile compound used in vapor phase deposition of tungsten oxide films for optical coatings. It qualifies as a chloride oxide of tungsten under tariff item 2827.39.00.
Duty Rate — China → Canada
0%
Import Tips
• Due to its volatility, ensure proper containment and declare the hazard class on shipping documents
• The CBSA may require a certificate of analysis to confirm the WCl4O formula
• If used for optical coatings, verify if it is classifiable as an optical element, which would fall under Chapter 90