Primuline Base from Japan
Primuline base is the primary aromatic amine derivative of benzothiazole used as the key intermediate for primuline direct dyes, explicitly listed under HTS 2934.20.3000. This chemically defined compound contains the unfused benzothiazole ring system required by the heading.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Reference historical dye intermediate status and CAS registry in commercial invoices
• Include synthesis pathway documentation showing benzothiazole ring derivation
• Distinguish from finished primuline dye (3204) by providing purity >95% specs