Naphthalene Trisulfonic Acid Trisodium Salt from Germany
Naphthalene trisulfonic acid trisodium salt is a multi-sulfo derivative of naphthalene, containing only sulfo groups. It is a chemically defined compound used in azo dye synthesis. Under the Customs Tariff of Canada, it is classified in tariff item 2908.99.00 as a sulfonated derivative of phenols or phenol-alcohols.
Duty Rate — Germany → Canada
0%
Import Tips
• Ensure the product is a pure, chemically defined compound; if it is a mixture of sulfonation products, it may be classified elsewhere
• Verify the product is not put up for retail sale as a dye preparation
• Provide the CAS number and purity certificate to the CBSA