Sodium Salt of 4-Aminoazobenzene Disulfonate (CAS 20592-48-5) from Japan
Commercially available as CAS 20592-48-5, this monosodium salt features the precise structure of 4-aminoazobenzenedisulfonic acid with one sodium cation. HTS 2927.00.03.00 explicitly names this compound as a diazo-/azo- compound within Chapter 29's scope for pure organic chemicals. Used in coupling reactions for disperse dye production.
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 CAS 20592-48-5 in all import docs; customs may require it for verification against tariff description
• Test for heavy metals (<10 ppm) as impurities could trigger REACH-like import restrictions
• Avoid retail packaging; bulk industrial shipments align best with chemical intermediate classification