2,3,4,6-Tetrachlorophenol from Canada
2,3,4,6-Tetrachlorophenol features four chlorine atoms in asymmetric distribution around the phenolic ring. Meets HTS 2908.19.60.00 'only halogen' criteria as obscure positional isomer. Used in analytical chemistry standards and toxicological studies.
Duty Rate — Canada → United States
5.5%
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
• Reference analytical standards require NIST-traceable certificates for CBP verification
• Small package research imports often duty-free under de minimis provisions
• Isomer-specific naming prevents generic 'chlorophenol' undervaluation attempts