Fire Retardant Additive CAS 84808-65-3
A chemical mixture primarily composed of (5-ethyl-2-methyl-2-oxido-3,2-dioxaphosphinan-5-yl)methyl methylphosphonate and bis(5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl methylphosphonate, known as FR-2 or DOPITE. Used as a flame retardant additive in polyurethane foams, textiles, and coatings to enhance fire resistance. Classified under HTS 3824.91.00.00 due to its specific phosphonate composition as a chemical preparation not elsewhere specified.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 5% | +25.0% | 30% |
| 🇲🇽Mexico | 5% | — | 5% |
| 🇨🇦Canada | 5% | — | 5% |
| 🇩🇪Germany | 5% | — | 5% |
| 🇯🇵Japan | 5% | — | 5% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing alpha-cypermethrin or other goods of heading 3808
Subheadings 3808.61-3808.69 apply only to specific pesticide-containing mixtures, shifting from chemical preparations.
If for other chemical preparations not matching the exact phosphonate formula
Generic chemical mixtures fall under residual subheading 3824.99 if lacking the specific phosphonates defined in 3824.91.
If imported as organo-phosphorus compounds in bulk, not as finished preparations
Pure organo-phosphorus compounds are classified by chemical structure in Chapter 29, not as mixtures in Chapter 38.
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Import Tips & Compliance
• Verify chemical composition matches the specific phosphonate substances listed in HTS 3824.91 to avoid reclassification
• Obtain Safety Data Sheets (SDS) and ensure EPA TSCA registration for import clearance
Related Products under HTS 3824.91.00.00
Amgard V-26-02 Textile Flame Retardant
Rhodium-based Amgard V-26-02 formulation rich in the HTS 3824.91 phosphonate compounds, applied as back-coating for curtains, upholstery, and apparel fabrics. Meets CPAI-84 and NFPA 701 fire standards for textiles. Classified here as it consists mainly of the specified phosphonate mixture for industrial chemical use.
DOPITE FR-2 Polyurethane Flame Retardant
Commercial formulation DOPITE FR-2 consisting mainly of the phosphonate isomers defined in 3824.91.00.00, used specifically in flexible polyurethane foam production for furniture and mattresses. Provides high phosphorus content for effective flame retardancy without halogen release. Falls under this HTS code as a preparation of specified chemical substances from the chemical industries.
Phosphonate-Based Flexible Foam Fire Retardant
Industrial concentrate for spray application in flexible slabstock polyurethane foam production, primarily containing the 3824.91.00.00 phosphonate actives. Used in automotive seating and bedding to achieve California TB 117 fire ratings. HTS classification based on main component being the specified chemical mixture.
Industrial Coating Flame Retardant Concentrate
High-concentration phosphonate mixture for intumescent coatings on steel structures and wood panels, matching 3824.91.00.00 substance requirements. Forms protective char layer during fire exposure. Classified as chemical preparation due to predominant specified phosphonate content.