Doverphos S-480 Phosphite for PVC Stabilization
Doverphos S-480 is distearyl pentaerythritol diphosphite providing hydrolysis resistance in rigid PVC pipe compounds. Classifies under HTS 3812.39.9000 as plastics compound stabilizer. Essential for long-term outdoor weatherability.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| šØš³China | 5% | +35.0% | 40% |
| š²š½Mexico | 5% | +10.0% | 15% |
| šØš¦Canada | 5% | +10.0% | 15% |
| š©šŖGermany | 5% | +10.0% | 15% |
| šÆšµJapan | 5% | +10.0% | 15% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If industrial fatty acid derivatives
Phosphite esters may classify as fatty derivatives if >70% chain length.
If basic phosphite esters
Chapter 29 for uncompounded phosphorus compounds.
If refractory plasticizers
Different matrix classification for high-temperature applications.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
ā¢ Certify phosphorous acid content per ASTM test methods
ā¢ Include PVC formulator trial data supporting stabilizer function
ā¢ Hydrophobic packaging required for moisture-sensitive phosphites
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