What is HS code 3907.21?

HS code 3907.21 covers: Bis(polyoxyethylene) methylphosphonate. It belongs to chapter 39 (Plastics and articles thereof) of the Harmonized System.

What is the US import duty for HS code 3907.21?

The US general (normal trade relations) rate is: 6.5%. Preference programs and Section 232/301 surcharges can change the effective rate; see the HTS lines for detail.

What is the UK commodity code for 3907.21?

The UK extends 3907.21 to 1 declarable 10-digit commodity code, starting with 3907210000. The full code goes on the UK customs declaration.

Chapter 39 · Plastics and articles thereof · Section 7

HS Code 3907.21

Bis(polyoxyethylene) methylphosphonate

Heading 3907: Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms

US duty (general)

6.5%

US HTS lines

EU CN codes

UK commodity codes

Unit

US HTS + UK Tariff v4.0.1596 · updated 2026-09-10 · sources

United States - HTS lines under 3907.21

Source: official Harmonized Tariff Schedule (USITC). "General" is the normal-trade-relations rate; "Special" lists preference programs; "Other" is the column-2 rate. Additional Section 232/301 duties may apply on top.

HTS code	Description	General	Special	Other	Unit
3907.21.00	Bis(polyoxyethylene) methylphosphonate	6.5%	Free (A, AU, BH, CL, CO, D, E, IL, JO, K, KR, MA, OM, P,PA, PE, S, SG)	2.2¢/kg + 33.5%	kg

Estimate the US duty runs in your browser · no caps

Enter the customs value (and quantity, when a rate is per-unit) to estimate the general-rate duty per HTS line. Estimates exclude Section 232/301 surcharges, MPF/HMF and fees. Not a customs ruling.

Customs value (USD) Quantity (kg)

European Union - CN codes under 3907.21

Source: EU Combined Nomenclature (Eurostat, © European Union, reused per Decision 2011/833/EU). Duty rates and measures live in TARIC; each code links to the official consultation.

CN code	Description
3907 21 00	Bis(polyoxyethylene) methylphosphonate	EU duty (TARIC) →

United Kingdom - commodity codes under 3907.21

Source: UK Integrated Online Tariff (Open Government Licence v3.0). Declarable 10-digit codes go on the customs declaration; check the official page for the current duty and VAT measures.

Commodity code	Description
3907 21 00 00	Bis(polyoxyethylene) methylphosphonate	UK duty & VAT →

Not a customs ruling. Classification is determined by the importing country's customs authority and depends on the exact product. This page is reference information from official published schedules, not legal advice. For a binding decision, request a ruling (US: CBP CROSS · UK: HMRC ATaR · EU: BTI).

Other subheadings in 3907

3907.00 3907 Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, a 3907.10 Polyacetals 3907.21 Bis(polyoxyethylene) methylphosphonate 3907.29 Other 3907.30 Epoxide resins 3907.40 Polycarbonates 3907.50 Alkyd resins 3907.61 Having a viscosity number of 78 ml/g or higher 3907.69 Other 3907.70 Poly(lactic acid) 3907.91 Unsaturated 3907.99 Other

Sources: U.S. International Trade Commission, Harmonized Tariff Schedule (public domain) · EU Combined Nomenclature © European Union, Eurostat (Decision 2011/833/EU) · UK Integrated Online Tariff, contains public sector information licensed under the Open Government Licence v3.0. Data refreshed weekly. Details on About & Data Sources.