Methyl [O-2-(Dipropylamino)ethyl] Methylphosphonite Ester from China
This O-alkyl ester of a dipropylaminoethyl hydrogen methylphosphonite falls squarely under HTS 2931.49.00.08 due to its defined dialkylamino and C≤10 alkyl structure. Primarily utilized in ligand synthesis for transition metal catalysts.
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
Import Tips
• Label containers with UN number for phosphorous esters; mislabeling leads to customs holds
• Provide structural formula verification via NMR/GC-MS data to confirm classification over broader 2931.49.00
• Avoid retail packaging as this triggers exclusion under Chapter notes for consumer preparations