Tetramethylthiuram Disulfide (TMTD)
TMTD functions as both an accelerator and sulfur donor in rubber vulcanization, particularly effective in EPDM and low-sulfur compounds. It qualifies for HTS 2930.90.92.31 as a thiuram disulfide organo-sulfur compound whose principal use is rubber processing, consistent with chapter notes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for pesticide-grade formulations
Thiurams used as fumigants or nematocides classify under pesticide organo-sulfur subheading.
If containing herbicides or fungicides
Pesticide products containing these compounds as active ingredients fall in Chapter 38.
If technical grade below 98% purity
Impure preparations not meeting chemically defined compound standards classify as chemical mixtures.
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Import Tips & Compliance
• Include vulcanization test data confirming rubber processing end-use to support classification
• Ensure packaging prevents moisture absorption which could affect purity declarations
• Note skin sensitization warnings on SDS as this triggers specific OSHA labeling for imports
Related Products under HTS 2930.90.92.31
N-Cyclohexyl-2-benzothiazole sulfenamide (CBS)
CBS is an organo-sulfur compound used as a delayed-action accelerator in rubber vulcanization, providing optimal processing safety and fast curing properties. It falls under HTS 2930.90.92.31 because it is a benzothiazole sulfenamide specifically designed for rubber processing, matching the chapter's classification for organo-sulfur compounds used principally in this application.
Zinc Dibenzyl Dithiocarbamate (ZBEC)
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.
2-Mercaptobenzothiazole (MBT)
MBT is a primary rubber accelerator used in acidic and neutral compounding systems, providing good aging properties. As a benzothiazolethiol organo-sulfur compound principally for rubber processing, it falls under HTS 2930.90.92.31 per Chapter 29 definitions.
Zinc 2-Mercaptobenzothiazole (ZMBT)
ZMBT acts as a medium-speed rubber accelerator with excellent dispersion properties, used in tire and mechanical goods production. Classified in HTS 2930.90.92.31 as its organo-sulfur metal coordination compound principal use is rubber vulcanization per chapter coordination compound rules.
N-Oxydiethylenebenzothiazole-2-Sulfenamide (NOBS/MBS)
NOBS provides delayed vulcanization with rapid curing rates, ideal for thick rubber articles like tires. This sulfenamide's principal rubber processing function places it under HTS 2930.90.92.31 as a chemically defined organo-sulfur compound.
Dipentamethylenethiuram Tetrasulfide (DPTT)
DPTT functions as both sulfur donor and accelerator in low-sulfur rubber systems, particularly for heat-resistant compounds. As a thiuram polysulfide organo-sulfur compound for rubber processing, it classifies under HTS 2930.90.92.31.