1,8-Dihydroxynaphthalene-3,6-disulfonic acid (H Acid) from China
1,8-Dihydroxynaphthalene-3,6-disulfonic acid, known as H Acid, is a key intermediate for azo dye synthesis. It is a separate chemically defined organic compound with two hydroxy groups and two sulfo groups. It falls under tariff item 2908.99.00 as a sulphonated derivative of phenols or phenol-alcohols.
Duty Rate — China → Canada
0%
Import Tips
• Provide the CAS number and purity analysis on the import documents
• Confirm that the product is not put up in a form for retail sale
• Check the CBSA's tariff classification advice for similar compounds to ensure consistency