Gamma Acid (1,8-Dihydroxynaphthalene-3,6-disulfonic acid isomer) from Japan
Gamma Acid, a positional isomer of H Acid also classified as 1,8-Dihydroxynaphthalene-3,6-disulfonic acid per tariff specificity. Used interchangeably in reactive dye manufacturing under the same HTS 2908.99.0900 provision.
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
• NMR spectra documentation differentiates isomers if CBP questions specificity
• Store below 40°C to prevent decomposition; declare stability data