p-Aminoazobenzenedisulfonic acid
p-Aminoazobenzenedisulfonic acid is a chemically defined diazo compound featuring an azo (-N=N-) linkage and two sulfonic acid groups, explicitly listed under HTS 2927.00.06.00. It serves as a key intermediate in the synthesis of direct dyes for textiles and paper.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 5.8% | +35.0% | 40.8% |
| 🇲🇽Mexico | 5.8% | +10.0% | 15.8% |
| 🇨🇦Canada | 5.8% | +10.0% | 15.8% |
| 🇩🇪Germany | 5.8% | +10.0% | 15.8% |
| 🇯🇵Japan | 5.8% | +10.0% | 15.8% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pre-diluted to standard strengths for azo dye production per Chapter 29 note 2(h)
Solutions prepared specifically for azo dye manufacturing may shift to Chapter 32 synthetic dye intermediates
If classified primarily by amine function rather than azo linkage
o-, m-, p-phenylenediamine derivatives fall under heading 2921, but Chapter 29 note prioritizes later numerical headings for dual-function compounds
If sulfonated but lacking distinct azo character
Sulfonated aromatics without clear diazo functionality may classify under earlier sulfonic acid headings
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Import Tips & Compliance
• Provide detailed chemical analysis (NMR, IR spectra) confirming azo structure and sulfonic acid purity to avoid reclassification as mixtures
• Include Safety Data Sheets (SDS) and ensure packaging complies with UN hazmat regulations for corrosive sulfonic acids
• Verify importer has proper TSCA registration as this compound requires EPA notification for U.S. manufacturing
Related Products under HTS 2927.00.06.00
Diazoaminobenzene (1,3-Diphenyltriazene)
Diazoaminobenzene, also known as 1,3-Diphenyltriazene, is a specific diazo compound explicitly named in HTS 2927.00.06.00 featuring the triazene (-NH-N=N-) functional group. Used as a reagent in organic synthesis and photographic chemistry.
p-Aminoazobenzene-2,4-disulfonic acid, 98% purity
High-purity technical grade p-Aminoazobenzene-2,4-disulfonic acid meets Chapter 29 definition for separate chemically defined azo compounds with sulfonic acid groups under HTS 2927.00.06.00. Primary use as dye coupling component.
Diazoaminobenzene stabilized with 0.1% citric acid
Diazoaminobenzene with stabilizer added per Chapter 29 note 2(f), maintaining classification under HTS 2927.00.06.00 as the stabilizer is solely for preservation/transport. Used in analytical chemistry standards.
1,3-Diphenyltriazene technical grade
Technical grade 1,3-Diphenyltriazene (synonym for diazoaminobenzene) explicitly covered by HTS 2927.00.06.00 as listed diazo compound. Intermediate for azo dye synthesis and radical scavenger applications.