4,4'-Diaminodiphenyl Ether (ODA) from Canada
4,4'-Diaminodiphenyl ether (oxydianiline, ODA) is an aromatic diamine used in high-performance polyimide and polyetherimide production. Classified under HTS 2921.59.80.90 as other aromatic polyamine derivative. The ether linkage between aromatic rings maintains polyamine classification.
Duty Rate — Canada → United States
6.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Provide monomer purity certificate (>98%) and HPLC analysis for classification
• End-use certificates may be required for aerospace/defense applications
• Avoid packaging that suggests finished polymer use to maintain intermediate status