HTS 3913.90.20 — rate composition
Base rate and applicable layers for this code, with an embedded calculator.
HTS 3913.90.20 (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: — Other: — Polysaccharides and their derivatives) carries an MFN general rate of 5.8% on U.S. imports; China-origin entries additionally stack Global Section 301 (CN, 12.5% tier). Example (origin CN · $10,000 · sea formal entry): duties + fees ≈ $1,877.14.Data as of 2026-10-07 (ruleset v0.3.4).
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: — Other: — Polysaccharides and their derivatives
USITC: 5.8%
Duty layers
| Layer | Rate | Amount | Basis |
|---|---|---|---|
Base duty (MFN) Active | 5.8% | $580.00 | HTS Column 1 general rate ↗ |
Global Section 301 (CN, 12.5% tier) In litigation | 12.5% | $1,250.00 | Trade Act 1974 §301 (global forced-labor program; FR 2026-15181 §1(a)(iii)) ↗ |
| Harbor Maintenance Fee (HMF) | 0.125% | $12.50 | 26 U.S.C. §4461 / 19 CFR 24.24 (sea & water shipments only) |
| Merchandise Processing Fee (MPF) | 0.3464% (once per entry, min $34.58 / max $670.86) | $34.64 | 19 U.S.C. §58c, FY2027 (from 2026-10-01) |
Example: origin CN · $10,000 · sea formal entry · date 2026-10-07
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U.S. full regime: MFN + 301 + 232 + MPF/HMF
Selected: 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: — Other: — Polysaccharides and their derivatives · Base 5.8%
FAQ
What is the U.S. import tariff rate for HTS 3913.90.20?
HTS 3913.90.20 (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: — Other: — Polysaccharides and their derivatives) carries an MFN general rate of 5.8% on U.S. imports; China-origin entries additionally stack Global Section 301 (CN, 12.5% tier). Example (origin CN · $10,000 · sea formal entry): duties + fees ≈ $1,877.14.Data as of 2026-10-07 (ruleset v0.3.4).
Do MPF/HMF fees apply to HTS 3913.90.20?
Yes. Fees are not duties and are charged per entry: Harbor Maintenance Fee (HMF) 0.125%; Merchandise Processing Fee (MPF) 0.3464% (once per entry, min $34.58 / max $670.86). ≈ $47.14 on the $10,000 formal-entry example; postal shipments ≤$2,500 use informal entry with fixed fees instead.
How does HTS 3913.90.20 differ from an HS code and Schedule B?
All three share the same root: HS is the World Customs Organization's 6-digit international baseline; HTS is the 10-digit U.S. import classification (first 6 digits identical to HS — 3913.90.20 on this page is shown at the 8-digit HTS level); Schedule B is the U.S. export code (first 6 digits match HTS, with Census-specific 8–10 digit suffixes). Use this HTS code for U.S. import duty, and Schedule B when exporting from the U.S. Full comparison: /en/guides/hts-vs-hs-vs-schedule-b
Related codes in Chapter 39 · Plastics and articles thereof
- 3901.10.50Polymers of ethylene, in primary forms: — Polyethylene having a specific gravity of less than 0.94: — Other
- 3902.90.00Polymers of propylene or of other olefins, in primary forms: — Other
- 3904.61.00Polymers of vinyl chloride or of other halogenated olefins, in primary forms: — Fluoropolymers: — Polytetrafluoroethylene (PTFE)
- 3907.61.00Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms: — Poly(ethylene terephthalate): — Having a viscosity number of 78 ml/g or higher
- 3907.69.00Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms: — Poly(ethylene terephthalate): — Other
- 3907.99.50Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms: — Other polyesters: — Other: — Other
- 3911.90.91Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms: — Other: — Other: — Other: — Other
- 3912.31.00Cellulose and its chemical derivatives, not elsewhere specified or included, in primary forms: — Cellulose ethers: — Carboxymethylcellulose and its salts
- 3912.90.00Cellulose and its chemical derivatives, not elsewhere specified or included, in primary forms: — Other
- 3915.90.00Waste, parings and scrap, of plastics: — Of other plastics
- 3916.20.00Monofilament of which any cross-sectional dimension exceeds 1 mm, rods, sticks and profile shapes, whether or not surface-worked but not otherwise worked, of plastics: — Of polymers of vinyl chloride
- 3917.29.00Tubes, pipes and hoses and fittings therefor (for example, joints, elbows, flanges), of plastics: — Tubes, pipes and hoses, rigid: — Of other plastics
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