p,p'-Diaminostilbene from Japan

p,p'-Diaminostilbene is an aromatic polyamine featuring a stilbene backbone, used in optical brighteners. As a derivative not covered by prior 2921.59 subheadings, it is classified in HTS 2921.59.80 under the last applicable amine-function heading.

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

• UV spectral data confirms stilbene chromophore distinguishing from simple diphenylamines

• Check fluorescent properties; may trigger 3204 reclassification if brightener-formulated

• Documentation must emphasize chemical intermediate status over end-use