Isopropyl [O-2-(Methylpropylamino)ethyl] Hydrogen Isopropylphosphonite from China
Complex phosphonite with mixed isopropyl/methylpropyl amino substituents, classified in HTS 2931.49.00.08 for its non-halogenated organo-phosphorus aminoethyl structure. Applied in fine chemical synthesis and agrochemical intermediates.
Duty Rate — China → United States
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Customs requires CAS number if assigned; generic phosphonites often lack them—use IUPAC name instead
• Test for phosphorous content to distinguish from sulfonated derivatives excluded from heading 2931
• For R&D imports, use temporary entries under 9813.00.05 to defer duties during testing