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3902.20.50.00/Effage B100 Polyisobutylene/Japan

Effage B100 Polyisobutylene from Japan

Effage B100 is a medium-high molecular weight polyisobutylene for pharmaceutical sealants and transdermal patches, under HTS 3902.20.5000 as 'Other' polyisobutylene meeting monomer purity requirements. Supplied as pharmaceutical-grade primary polymer.

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

• Include USP/EP certificates and DMF references; ensure clean room packaging verification; segregate pharma from industrial grades for different regulations