4-Amino-2-stilbenesulfonic acid from China
4-Amino-2-stilbenesulfonic acid is an aromatic amine derivative containing a sulfonic acid group and a stilbene backbone. It is used as an intermediate in the production of optical brighteners. This chemically defined compound is classified under tariff item 2921.49.00.
Duty Rate — China → Canada
0%
Import Tips
• Ensure the product is not classified as a dye under Chapter 32 if put up for retail sale
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