Dye Coupling Grade Naphthalenetrisulfonic Acid Isomer Mix from Mexico
A specialty isomer mixture of 1,3,6- and 1,3,7-naphthalenetrisulfonic acids optimized for diazo coupling in azo pigment production. This chemically defined sulfonated naphthalene derivative falls under tariff item 2904.10.00.
Duty Rate — Mexico → Canada
0%
Import Tips
• Classify the product under 2904.10.00 as a mixture of sulphonated derivatives
• Keep records of the isomer ratio for CBSA verification
• Check if the product is subject to the Export and Import Permits Act