4,4'-Diaminostilbene-2,2'-disulfonic acid Powder from Mexico
4,4'-Diaminostilbene-2,2'-disulfonic acid powder is the powdered form of a chemically defined aromatic polyamine derivative. It is a white to light yellow crystalline compound used as a dye precursor and in optical brighteners. As a separate chemically defined organic compound, it is classified under tariff item 2921.59.00.
Duty Rate — Mexico → Canada
0%
Import Tips
• Ensure the product is in powder form and chemically defined
• Have the CAS number and technical data sheet available for customs
• Verify if the product is subject to any import restrictions or permits