Thiuram E (Tetramethylthiuram Tetrasulfide)
Thiuram E, or tetramethylthiuram tetrasulfide, functions as an ultra-accelerator in natural rubber vulcanization. Classified under HTS 2930.30.60.00 as other thiuram sulfides, it meets Chapter 29 criteria for organo-sulfur compounds with direct C-S bonds. This is supplied in pure form for chemical processing applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used in immunological or pharmaceutical preparations
Chapter 29 excludes immunological products of 3002; thiurams in pharma contexts shift there.
If for compounded forms in rubber additive mixtures
Mixed or prepared rubber chemicals are classified in 3812, not pure Chapter 29 compounds.
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Import Tips & Compliance
• Certify as >98% purity to maintain Chapter 29 classification; provide end-use statement for rubber industry; watch for misclassification as pesticide disulfiram analog
Related Products under HTS 2930.30.60.00
Tetramethylthiuram Disulfide (TMTD)
Tetramethylthiuram disulfide, commonly known as TMTD, is a thiuram disulfide used primarily as an accelerator in rubber vulcanization processes. It falls under HTS 2930.30.60.00 as it is a thiuram disulfide compound containing sulfur directly linked to carbon atoms, classified as an organo-sulfur compound per Chapter 29 notes. This chemical is supplied as a pure, separate organic compound without additives that would alter its classification.
Tetraethylthiuram Disulfide (TETD)
Tetraethylthiuram disulfide (TETD) is a thiuram tetrasulfide derivative used as a vulcanization accelerator in the tire and rubber industries. Classified under HTS 2930.30.60.00 as 'other' thiuram mono-, di-, or tetrasulfides, it qualifies as an organo-sulfur compound with sulfur directly bonded to carbon. It is typically imported as a technical-grade powder meeting chemical purity standards.
Tetramethylthiuram Monosulfide (TMTM)
Tetramethylthiuram monosulfide (TMTM) serves as a delayed-action accelerator in rubber compounding, particularly for thick articles. It is classified in HTS 2930.30.60.00 as an 'other' thiuram sulfide under organo-sulfur compounds, containing the required direct sulfur-carbon linkages. This product is handled as a high-purity chemical intermediate.
Tributylthiuram Tetrasulfide (TBzTD)
Tributylthiuram tetrasulfide (TBzTD) is a specialty thiuram tetrasulfide accelerator offering safe processing for low-sulfur rubber compounds. Under HTS 2930.30.60.00, it qualifies as 'other' thiuram sulfides within organo-sulfur compounds due to its molecular structure with multiple sulfur atoms linked to carbon. It is imported as a distinct chemical substance for industrial synthesis.