2930.90.92.31/Zinc Dibenzyl Dithiocarbamate (ZBEC)/Mexico

Zinc Dibenzyl Dithiocarbamate (ZBEC) from Mexico

ZBEC serves as a super-accelerator for low-sulfur vulcanization systems in rubber compounds, offering rapid curing at low temperatures. Classified under HTS 2930.90.92.31 as an organo-sulfur dithiocarbamate derivative principally used in rubber processing per Chapter 29 organo-sulfur provisions.

Duty Rate — Mexico → United States

100%

Rate breakdown

9903.04.6096.3%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)

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Import Tips

• Verify TSCA registration and provide certificate of analysis showing metal-organic sulfur structure

• Label as 'rubber accelerator' with CAS number 55310-56-0 to prevent misclassification

• Avoid bulk packaging over 25kg drums which may trigger additional hazmat shipping declarations