2-Diazo-1-Naphthol-4-Sulfonic Acid from China
A diazo coupling agent used in diazo-type copying papers and films, reacting to produce visible azo images upon light exposure. It is a separate chemically defined organic compound with a diazo group, classified under tariff item 2927.00.00 for diazo-, azo- or azoxy-compounds.
Duty Rate — China → Canada
0%
Import Tips
• Ensure the product is not put up in photographic plates or film; if it is, it would fall under Chapter 37
• Provide the chemical name and CAS number for customs clearance