4,4'-Diaminodiphenyl Ether (ODA) from Mexico
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 — Mexico → United States
16.5%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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