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Harmonized Tariff Schedule (2025 HTS Revision 17 (08/01/2025))

Heading	Duty(general)	Article Description	Compare Code
3913		Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms:	--
3913.10.00.00	4.2%	Alginic acid, its salts and esters	vs-3913
3913.90		Other:	vs-3913100000
3913.90.10.00	Free	Chemical derivatives of natural rubber	vs-391390
3913.90.20	5.8%	Polysaccharides and their derivatives	vs-3913901000
3913.90.20.15	5.8%	Xanthan gum	vs-39139020
3913.90.20.90	5.8%	Other	vs-3913902015
3913.90.50.00	6.5%	Other	vs-3913902090