Meaning
A standardized six-digit tariff classification code designates prepared anti-oxidizing agents and other compound stabilizers formulated for rubber or plastics within the international Harmonized System. Customs authorities use HS Code 381239 to classify specialized additive packages, including hindered amine light stabilizers, phosphite antioxidants, and heat-stabilizing masterbatches imported for polymer compounding. Correct classification ensures accurate duty rate assessment and compliance with international trade regulations across importing and exporting nations.
Polymer distributors must declare this code on shipping dockets and commercial invoices during cross-border transactions.
Tariff Classification
Global supply chains depend on precise code assignment to avoid customs delays, financial penalties, or incorrect duty assessments. Subheading 381239 specifically excludes pure single chemical compounds, which fall under separate organic chemistry chapters, requiring masterbatches to contain chemical mixtures or active carriers. Under HS Code 381239, custom compounders import concentrated antioxidant blends designed to prevent thermal degradation during polyolefin extrusion.
Misclassification under general chemical codes leads to customs audits and unexpected retroactive tariffs.
Chemical Composition
Plastic additives imported under this classification include multi-component systems tailored to protect polymers against ultraviolet radiation and oxidative degradation. Hindered phenols and organophosphites act synergistically inside the polymer matrix to neutralize free radicals formed during high-temperature melt processing. Importing additives under HS Code 381239 provides compounders with certified stabilization inputs necessary for outdoor polyolefin products.
Formulators verify that active ingredient ratios match import declaration documentation to maintain batch consistency.
Regulatory Compliance
Cross-border customs declarations require supporting technical data sheets and safety data sheets to verify product composition. National chemical inventories cross-check imports registered under this tariff heading against restricted substance lists. Applying correct declarations under HS Code 381239 ensures smooth customs clearance and regulatory traceability for international additive shipments.
