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3902.90.00.50/Isotactic Polybutene Granules/Mexico

Isotactic Polybutene Granules from Mexico

Isotactic polybutene granules, a stereoregular polymer of butene with high crystallinity, fall under HTS 3902.90.0050 as 'other' primary olefin polymers (>95% butene content). Used in films and molded parts for its strength and chemical resistance. Classified per note (a)(1) for named poly- prefixes.

Duty Rate — Mexico → United States

16.5%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Include stereochemistry details in technical data sheets for CBP review

• Segregate from polyethylene shipments to prevent co-mingling errors

• Watch for moisture content affecting primary form integrity

Isotactic Polybutene Granules from Mexico — Import Duty Rate | HTS 3902.90.00.50