n-Butyl-(Dipropylamino)butylidene Phosphonamidic Fluoride Hydrochloride from Japan
The protonated hydrochloride salt of a C4 phosphonamidic fluoride with di-n-propylamino functionality, all chains ≤C10, qualifying under HTS 2931.59.0030 which explicitly includes alkylated/protonated salts. These salts improve handling stability for transport in pharmaceutical synthesis. Exact structural match to the subheading's chemical definition.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Salt form requires counterion specification in technical documentation; mismatch can cause reclassification
• DOT hazardous material declaration mandatory - typically Class 6.1 toxic substance