4,4'-Benzidine-2,2'-Disulfonic Acid from China
4,4'-Benzidine-2,2'-disulfonic acid is a chemically defined aromatic polyamine derivative featuring two sulfonic acid groups on a benzidine core. It is used primarily as an intermediate in the synthesis of dyes and pigments. As an aromatic polyamine derivative, it is classified under tariff item 2921.59.00.
Duty Rate — China → Canada
0%
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• Confirm the product is a separate chemically defined organic compound with no added stabilizers or solvents beyond what is necessary for transport
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