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2931.44.00.00/Stabilized Methylphosphonic Acid Flakes/China

Stabilized Methylphosphonic Acid Flakes from China

Methylphosphonic acid flakes with minimal stabilizer for safe transport, falling under HTS 2931.44.00.00 per Chapter 29 note (f) allowing added stabilizers. Used in polymer flame retardant production.

Duty Rate — China → United States

16.2%

Rate breakdown

9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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Import Tips

• Document stabilizer as necessary for preservation only; test for anti-caking agents

• Pitfall: excessive additives trigger note (g) but risk specific use exclusion