Phosflex 71B Flame Retardant
Phosflex 71B is a commercial grade of bis(polyoxyethylene) methylphosphonate, used as a low-viscosity reactive flame retardant in polyurethane foams and coatings. It falls under tariff item 3907.21.00 because its chemical structure matches the named product, and it is presented in primary form as a liquid.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is formulated as an epoxy resin rather than a pure phosphonate.
Epoxy resins have a different chemical structure and are classified separately.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the product's viscosity and purity with a certificate of analysis, as additives like stabilizers must be below 1% by weight to avoid reclassification
• Ensure the shipment is labeled clearly as bis(polyoxyethylene) methylphosphonate for customs clearance
Related Products under Tariff item 3907.21.00
Antiblaze 182 Flame Retardant
Antiblaze 182 is a flame retardant consisting of bis(polyoxyethylene) methylphosphonate in primary form, specifically formulated for textile and paper coatings. It falls under tariff item 3907.21.00 because its chemical composition matches the named product, and it is not excluded by Chapter 39 notes as it is a polymer-based chemical product.
Bis(polyoxyethylene) methylphosphonate (BPEMP)
Bis(polyoxyethylene) methylphosphonate (BPEMP) is a polyether compound used primarily as a flame retardant in various industrial applications. It is classified under tariff item 3907.21.00 as it directly matches the named chemical product, and Chapter 39 notes do not exclude it since it is a polymer in primary form.
TEP-Enhanced BPEMP Polyether
TEP-Enhanced BPEMP Polyether is a formulation of bis(polyoxyethylene) methylphosphonate modified with triethyl phosphate, maintaining over 95% of the named polymer content. It is classified under tariff item 3907.21.00 per subheading note 1(a)(1), as the core monomer units of the named polymer predominate by weight.