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4-Amino-3-hydroxy-1-naphthalenesulfonic acid from Japan

This specifically named aminohydroxynaphthalenesulfonic acid under HTS 2922.21.1000 serves as a building block for direct dyes and metal complex dyes. Contains required amino, hydroxy, and sulfonic functions on naphthalene core. Technical grade 90%+ purity standard.

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%

Import Tips

Position-specific isomer verification via LC-MS essential

Biuret test confirms absence of urea impurities from synthesis

Customs lab testing common for novel naphthalenedisulfonic isomers

4-Amino-3-hydroxy-1-naphthalenesulfonic acid from Japan — Import Duty Rate | HTS 2922.21.10.00