Pseudoephedrine Impurity Standard (Norephedrine HCl) from China
Certified reference material of norephedrine hydrochloride used as impurity standard in pseudoephedrine quality control testing. Classified under HTS 2939.44.00.00 as pure norephedrine salt for laboratory use. Essential for HPLC method validation in pharmaceutical QC labs.
Duty Rate — China → United States
0%
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
• Include certificate of analysis with assigned purity value; small package lab chemicals still need TSCA notification
• Avoid bulk classification for research quantities