Tris(2,4-di-tert-butylphenyl) Phosphite
Tris(2,4-di-tert-butylphenyl) phosphite (AO-168) is a hindered phosphite for polyethylene stabilization. Sterically protected phosphite ester under HTS 2920.29.00.00.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If rubber/plastic antioxidants
Antioxidant mixtures for polymers classified under 3812.
If phenol content >50%
High phenol content mixtures classified by phenolic component.
If synergistic stabilizer blend
Multi-component stabilizer systems are chemical preparations.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• CAS 31570-04-4 verification prevents generic phosphite classification
• Dust hazard documentation for fine powder handling
• High purity (>99%) specification maintains chemical compound status
Related Products under HTS 2920.29.00.00
Trimethyl Phosphite
Trimethyl phosphite is a colorless liquid organophosphorus compound with the formula P(OCH3)3, classified under HTS 2920.29.00.00 as a phosphite ester. It is used as a reagent in organic synthesis and as an intermediate for pesticides and flame retardants.
Triethyl Phosphite
Triethyl phosphite (P(OCH2CH3)3) is an organophosphorus compound used in the synthesis of insecticides and as a ligand in metal catalysis. It qualifies under HTS 2920.29.00.00 as 'other' phosphite esters excluding halide esters.
Triphenyl Phosphite
Triphenyl phosphite is a white crystalline solid used as a stabilizer in PVC plastics and as an antioxidant. Classified under HTS 2920.29.00.00 as a phosphite ester and its derivatives.
Tris(2-ethylhexyl) Phosphite
Tris(2-ethylhexyl) phosphite is a viscous liquid phosphite ester used as a secondary plasticizer and heat stabilizer. Falls under HTS 2920.29.00.00 as an 'other' phosphite ester.
Diphenyl Decyl Phosphite
Diphenyl decyl phosphite serves as an antioxidant in lubricants and greases. This mixed phosphite ester is classified under HTS 2920.29.00.00.
Isodecyl Diphenyl Phosphite
Isodecyl diphenyl phosphite functions as a hydrolysis stabilizer in polyurethane formulations. Classified as a phosphite ester under HTS 2920.29.00.00.