HS 3907.21

Subheading

Polyethers other than polyacetals; in primary forms, bis(polyoxyethylene) methylphosphonate

HS Code 3907.21 classifies "Polyethers other than polyacetals, in primary forms, bis(polyoxyethylene) methylphosphonate" under Section VII (Plastics and Rubber). This subheading-level code is used internationally for customs classification, tariff determination, and trade statistics.

Classification Details

HS Code3907.21
DescriptionPolyethers other than polyacetals; in primary forms, bis(polyoxyethylene) methylphosphonate
LevelSubheading (6-digit)
SectionVII — Plastics and Rubber
Chapter39

🇺🇸 US Import Duty

Average Duty Rate3.5%
Duty Range0-6.5%
NotesPlastics and articles thereof
Free Trade AgreementsMost FTAs: 0%

Rates are approximate and based on MFN (Most Favored Nation) tariffs. Actual rates may vary by specific product classification. Always verify with USITC for official rates.

Classification Guide

When classifying goods under HS 3907.21, ensure the product matches the specific description. This 6-digit subheading is the international standard. Most countries add 2-4 additional digits for national tariff lines. Check your destination country's tariff schedule for the full code.

Trade Context

Section VII covers plastics and rubber products, essential materials for manufacturing.

Regulatory Note

Environmental regulations increasingly affect plastic trade. Some countries ban certain single-use plastics.

🇺🇸 US Import Document Checklist

Documents required when importing products under HS 3907.21 into the United States.

Required for All Imports

☑Commercial InvoiceCBP
Detailed invoice from the seller showing product description, quantity, unit price, total value, and terms of sale (Incoterms).
☑Packing ListCBP
Itemized list of contents in each package, including weights, dimensions, and marks/numbers matching the shipping containers.
☑Bill of Lading (B/L) or Airway BillCarrier
Transport document issued by the carrier confirming receipt of goods for shipment. Acts as a contract of carriage and receipt.
☑CBP Entry Summary (Form 7501)CBP
The formal customs declaration filed with US Customs and Border Protection for all commercial imports.
☑Importer Security Filing (ISF/10+2)CBP
Must be filed at least 24 hours before ocean cargo is loaded. Required for all ocean shipments to the US.
☑Customs BondCBP
A financial guarantee ensuring payment of duties, taxes, and fees. Required for commercial shipments over $2,500.

Product-Specific Requirements

⚠️TSCA Import CertificationRequired

Certification of compliance with EPA's Toxic Substances Control Act.

Agency: EPA

FTA Certificate of Origin (for preferential rates)

🤝USMCA Certificate of Origin — self-certification by importer, exporter, or producer. No prescribed format.
🤝Korea-US FTA Certificate of Origin — can be issued by importer, exporter, or producer.

This checklist is for general guidance only. Actual requirements may vary based on specific product, country of origin, and current regulations. Always consult with a licensed customs broker or the relevant agency for official requirements.

Related HS Codes

39.01Polymers of ethylene, in primary forms3901.10Ethylene polymers; in primary forms, polyethylene having a s3901.20Ethylene polymers; in primary forms, polyethylene having a s3901.30Ethylene polymers; in primary forms, ethylene-vinyl acetate 3901.40Ethylene polymers; in primary forms, ethylene-alpha-olefin c3901.90Ethylene polymers; in primary forms, n.e.c. in heading no. 339.02Polymers of propylene or of other olefins, in primary forms3902.10Propylene, other olefin polymers; polypropylene in primary f

Related Data

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Frequently Asked Questions

What is HS Code 3907.21?
HS Code 3907.21 classifies "Polyethers other than polyacetals, in primary forms, bis(polyoxyethylene) methylphosphonate" under Section VII (Plastics and Rubber). This subheading-level code is used internationally for customs classification, tariff determination, and trade statistics.
What products fall under HS 3907.21?
HS Code 3907.21 covers: Polyethers other than polyacetals, in primary forms, bis(polyoxyethylene) methylphosphonate. This is a specific product classification used for customs declarations worldwide.
How do I use HS Code 3907.21 for customs?
When classifying goods under HS 3907.21, ensure the product matches the specific description. This 6-digit subheading is the international standard. Most countries add 2-4 additional digits for national tariff lines. Check your destination country's tariff schedule for the full code.
What are the trade regulations for Plastics and Rubber?
Environmental regulations increasingly affect plastic trade. Some countries ban certain single-use plastics.
Is HS 3907.21 the same in every country?
The first 6 digits of HS codes are standardized worldwide by the World Customs Organization (WCO). However, most countries add additional digits (8-10 total) for their national tariff schedules. Always verify the full code with your destination country's customs authority.
What is the US import duty for HS 3907.21?
The average US import duty for products under HS 3907.21 is approximately 3.5% (range: 0-6.5%). Most FTAs: 0% Note: actual rates depend on the specific product classification and country of origin. Verify with USITC for official rates.
Can I get a lower tariff rate under a Free Trade Agreement?
Most FTAs: 0%. The US has FTAs with 20 countries including Canada, Mexico (USMCA), South Korea (KORUS), Australia, and others. To qualify for preferential rates, goods must meet rules of origin requirements and have proper documentation (e.g., Certificate of Origin).

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