2925.19.91.00/N-Hydroxysuccinimide (NHS)/Japan

N-Hydroxysuccinimide (NHS) from Japan

N-Hydroxysuccinimide is an activated ester/imide used in peptide synthesis and bioconjugation chemistry. The imide ring structure qualifies it for HTS 2925.19.91.00 as 'other' imide derivatives despite hydroxy substitution.

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

• Biotech end-use requires FDA DMF or equivalent; research use exempt

• Moisture sensitive; specify <0.5% water content on CoA

• Common with EDC coupling agent; declare separately to avoid set classification