4,4'-Diamino-2,2'-stilbenedisulfonic acid from Mexico
4,4'-Diamino-2,2'-stilbenedisulfonic acid is a chemically defined aromatic polyamine derivative with two amino groups and two sulfonic acid groups on a stilbene backbone. It is used as a dye precursor and in optical brightener production. As an aromatic polyamine derivative, it falls under tariff item 2921.59.00.
Duty Rate — Mexico → Canada
0%
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