2-Methyl-2,5-Dioxo-1-Oxa-2-Phospholane from China
2-Methyl-2,5-dioxo-1-oxa-2-phospholane is a cyclic phosphate ester explicitly named in HTS 2934.99.70.00, classified among other heterocyclic compounds. This organophosphorus compound with five-membered ring containing oxygen and phosphorus is used in polymer synthesis and as a phosphorylating agent.
Duty Rate — China → United States
12.5%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Include NMR and GC-MS spectra in documentation to confirm cyclic phospholane structure distinguishing from acyclic phosphates
• Classify as UN 3265 (corrosive liquid, acidic) and ensure proper inner packaging for air/sea transport
• Watch for TSCA inventory listing; pre-registration required for first import into US