2921.59.17.00-4,4'-Benzidine-2,2'-disulfonic acid;

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Harmonized Tariff Schedule (2025 HTS Revision 30 (11/21/2025))

HTS Code	2921.59.17.00
Article Description	4,4'-Benzidine-2,2'-disulfonic acid; 1,4-Diaminobenzene-2-sulfonic acid; 4,4'-Methylene bis ((3-chloro-2,6-diethylaniline); 4,4'-Methylene bis(2,6-diethylaniline); 4,4'-Methylene bis (2,6-diisopropylaniline);m-Xylene diamine; and 3,3'-Diaminobenzidine (tetraaminobiphenyl)
Quota of Quantity
Unit of Quantity	[kg]
Rates of Duty (1-General)	Free
Rates of Duty (1-Special)
Rates of Duty (2-Cuba and North Korea)	15.4¢/kg + 60%
Footnotes	[{columns=[general], value=See 9903.88.03. , type=endnote}]
Additional Duty
Additional Duty(products of China)

Section VI:	Products of the Chemical or Allied Industries
Chapter 29	Organic chemicals
Heading 2921	Amine-function compounds Acyclic monoamines and their derivatives; salts thereof:
Subheading 2921.59	Other: