N-Propyl Methylphosphonate from China
Organophosphorus compound with formula CH3P(O)(O CH2CH2CH3)(OR), where R meets the single n-propyl criterion of HTS 2931.49.0055. The phosphorus bears exactly one methyl directly and one n-propyl alkoxy chain. Hydraulic fluid additive and extractant.
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
• Provide viscosity and flash point data for proper hazmat classification (UN1267 or similar)
• Verify chain length via HPLC; n-propyl vs iso-propyl affects statistical reporting
• Industrial end-use declaration prevents consumer chemical misrouting