2921.59.80.90/4,4'-Diaminodiphenyl Ether (ODA)/Japan

4,4'-Diaminodiphenyl Ether (ODA) from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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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