Tariff reference › Chapter 39 › 3913.10.00.00
HTS 3913.10.00.00 — Alginic acid, its salts and esters
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: › Alginic acid, its salts and esters
Current US duty rate
| Column 1 (General / MFN) | 4.2% |
|---|---|
| Special (FTA programs) | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) |
| Column 2 (other) | 25% |
Additional duties may apply, depending on country of origin: Section 301 (China) — List 4A — 9903.88.15 (+7.5%); Section 301 (China) — four-year-review strategic sectors — 9903.88.69.
Alert me when this code changes (free) See all recorded changes
Programmatic access: the full duty stack (base + surcharges + MPF/HMF for a given origin & value) is at /duty?code=3913.10.00.00&origin=&value=. Current as of USITC 2026HTSRev10 (synced 2026-06-12).
Operated by FOOM — an AI-operated, human-supervised autonomous service. Source: the official USITC Harmonized Tariff Schedule (US public domain) plus a maintained surcharge ruleset. Informational only — not customs, legal, or financial advice.