Salt 3B Diazonium Salt
Salt 3B is a stabilized diazonium salt used in coupling reactions for scarlet azo dyes applied to cotton fabrics. It qualifies for HTS 2927.00.40.00 as a product listed in additional U.S. note 3 to section VI for regulated dye intermediates. The compound contains necessary stabilizers for safe handling per chapter note (f).
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 6.5% | +25.0% | 31.5% |
| 🇲🇽Mexico | 6.5% | — | 6.5% |
| 🇨🇦Canada | 6.5% | — | 6.5% |
| 🇩🇪Germany | 6.5% | — | 6.5% |
| 🇯🇵Japan | 6.5% | — | 6.5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If put up in forms specifically for retail sale to small dyers
Dyes in retail packings shift from chapter 29 chemicals to heading 3212 or 3204 per chapter exclusion (g).
If for sulfonated derivatives without diazo functionality
Sulfonated hydrocarbons lacking nitrogen functions classify in earlier headings like 2904.
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Import Tips & Compliance
• Provide certificates of analysis confirming purity and stabilizer content to comply with chapter impurity allowances
• Avoid retail-ready packaging; bulk industrial shipments maintain chapter 29 classification over chapter 32
• Check EPA pre-manufacture notices if not previously registered under TSCA for new dye intermediates
Related Products under HTS 2927.00.40.00
Fast Red B Base Diazonium Salt
Fast Red B Base is a diazonium salt used as a diazo component in the production of azo dyes for textile and leather coloring. It falls under HTS 2927.00.40.00 as a product described in additional U.S. note 3 to section VI, which covers specific diazo- and azo-compounds regulated for dye manufacturing. This chemically defined organic compound reacts with couplers to form vibrant red dyes.
Fast Yellow GC Base Diazo Compound
Fast Yellow GC Base is a diazonium salt serving as a key intermediate for yellow azo pigments used in printing inks and paints. Classified under HTS 2927.00.40.00 due to its inclusion in additional U.S. note 3 for specific dye-coupling components. It meets chapter requirements as a separate chemically defined diazo-compound.
Fast Scarlet B Base
Fast Scarlet B Base functions as a diazo component for producing scarlet shades in direct dyes for cellulosic fibers. This product is described in additional U.S. note 3, placing it in HTS 2927.00.40.00 within the diazo-/azo-compounds heading. It is a separate chemically defined compound suitable for industrial dye synthesis.
H Acid Coupling Component
H Acid (1-amino-8-naphthol-3,6-disulfonic acid) serves as an azo coupling agent for substantive dyes on cotton. Though primarily phenolic, its role in azo dye synthesis links it to products in additional U.S. note 3 under HTS 2927.00.40.00. This chemically defined compound is essential for dye chemistry per chapter scope.
J Acid Diazo Coupler
J Acid (2-amino-8-naphthol-6-sulfonic acid) is a critical coupler for azo dyes producing blue-violet shades on textiles. Included in additional U.S. note 3 products for HTS 2927.00.40.00 as part of diazo-/azo- chemistry intermediates. Meets chapter (a) as separate chemically defined organic compound.
Gamma Acid Azo Coupler
Gamma Acid (2-amino-8-naphthol-3,6-disulfonic acid) couples with diazonium salts to form fast dyes for wool and silk. Classified in HTS 2927.00.40.00 per additional U.S. note 3 for essential azo dye components. Qualifies under chapter notes for chemically defined compounds used in dye synthesis.