High Purity Naphthalic Anhydride for Dye Synthesis from Mexico
High-purity naphthalic anhydride (>99%) is a separate chemically defined aromatic polycarboxylic anhydride used in perylene dye manufacturing. It is not a derivative of phthalic acid but of naphthalene, yet it still falls under heading 29.17 as an aromatic polycarboxylic anhydride.
Duty Rate — Mexico → Canada
0%
Import Tips
• Ensure the product is a separate chemically defined compound; the high purity supports this
• The use in dye manufacturing does not affect classification, as the chemical identity is what matters
• Provide the CAS number (81-84-5) on the commercial invoice for CBSA verification