Songnox 259 Polymer Stabilizer
Songnox 259 is 1,6-Hexanediol bis(3,5-dibutyl-4-hydroxyphenyl)propionate supplied as white powder or flakes for stabilizing polypropylene and polyethylene against thermal oxidation. Classified under HTS 2918.29.06.00 due to its carboxylic acid with phenol function structure, fitting Chapter 29's scope for chemically defined organic compounds with oxygen functions.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified primarily by saturated acyclic alcohol function
The diol backbone might suggest 2915 classification, but Chapter 29 rule requires latest numerical heading for multi-function compounds.
If for masterbatch formulations with carrier resin
When pre-dispersed in polymer carrier (>50% additive), classified as plastic additive preparations rather than pure chemical.
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
• Label shipments with exact CAS number (123-66-0 equivalent structure) and batch purity to match the specific HTS subheading
• Avoid common pitfall of declaring as 'antioxidant mixture' which shifts to 3824; specify as pure compound
• Comply with REACH/TSCA registration proofs for polymer additives entering US markets
Related Products under HTS 2918.29.06.00
Irganox 259 Antioxidant
Irganox 259 is the commercial name for 1,6-Hexanediol bis(3,5-dibutyl-4-hydroxyphenyl)propionate, a high-performance hindered phenolic antioxidant used to prevent oxidative degradation in polymers. It falls under HTS 2918.29.06.00 as a specific carboxylic acid with phenol function and additional oxygen functionality, classified by its precise chemical structure in Chapter 29 for separate chemically defined organic compounds.
ADK Stab AO-259 Antioxidant
ADK Stab AO-259, chemically 1,6-Hexanediol bis(3,5-dibutyl-4-hydroxyphenyl)propionate, serves as a primary antioxidant in engineering plastics like nylon and polyester for long-term heat stability. It is specifically named in HTS 2918.29.06.00 under carboxylic acids with phenol function, as a chemically defined compound per Chapter 29 notes.
Lowinox 259B Polymer Antioxidant
Lowinox 259B is the beaded form of 1,6-Hexanediol bis(3,5-dibutyl-4-hydroxyphenyl)propionate, designed for easy handling in polyolefin extrusion processes. Falls under HTS 2918.29.06.00 as the named carboxylic acid derivative with phenol and alcohol functions, classified as a pure organic compound in Chapter 29.
Hexanediol Bisphenol Propionate Stabilizer 2918
Technical-grade 1,6-Hexanediol bis(3,5-dibutyl-4-hydroxyphenyl)propionate used in wire/cable insulation compounds for electrical stability. Precisely matches HTS 2918.29.06.00 description as a phenolic carboxylic acid derivative with defined structure.