Harmonized Tariff Schedule of the U.S. › Chapter 39 Plastics and articles thereof
3913.10.00.00Tariff line
Classification path
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
Alginic acid, its salts and esters
3913.10.00.00
Rates of duty
General rate (Column 1)4.2%
SpecialFree (A, AU, BH, CL, CO, D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG)
Column 225%
Unitkg
Free (A, AU, BH, CL, CO, D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG)
Printed page 1701
Measure flags
for origin CN, entry date 2026-10-26 · base rate 4.2%
- Section 301 forced-labor tariff (12.5%)9903.05.31Applies+12.5%China: Column 1 rate + 12.5% additional
- China 301 List 4A (9903.88.15)9903.88.15Applies+7.5%8-digit subheading 3913.10.00 is on L4A
- 301 exclusion 9903.88.69 (by product description)9903.88.69ConditionalexemptSodium alginate resins (CAS No. 9005-38-3) — only the products described; expires 2026-11-09 11:59 p.m. EDT
- PGAFDA FD3
Confirmed total 24.2% · max 24.2%Full duty breakdown →