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2,3,4,6-Tetrachlorophenol from Mexico

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 — Mexico → United States

100%

Rate breakdown

9903.04.6094.5%Pharmaceuticals Annex IV: patented pharma articles — 100% floor rate
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)

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