N-tert-Butyl-2-benzothiazolesulfenamide (TBBS)
N-tert-Butyl-2-benzothiazolesulfenamide (TBBS) is a specific sulfenamide accelerator containing a benzothiazole ring-system, classified under HTS 2934.20.0500 as a heterocyclic compound not further fused. It is primarily used in the rubber industry to control vulcanization speed and improve processed rubber properties.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported pre-mixed with rubber or as compounded accelerator paste
Mixtures of rubber accelerators with additives or carriers fall under Chapter 38 as prepared rubber accelerators rather than pure organic compounds.
If blended with stabilizers or anti-dusting agents exceeding Chapter 29 note g limits
Preparations with added substances that alter general use classification move to Chapter 38 as chemical preparations, not pure heterocyclic compounds.
If classified primarily by organo-sulfur function rather than heterocyclic ring
Organo-sulfur compounds without emphasis on benzothiazole ring may fall under heading 2930, though 2934 takes precedence per numerical order rule.
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Import Tips & Compliance
• Provide chemical analysis certificates confirming TBBS purity (>97%) and benzothiazole structure to avoid misclassification as mixtures under Chapter 38
• Ensure packaging complies with UN regulations for hazardous materials (toxic dust risk) with proper labeling for industrial chemical import
• Verify REACH compliance for EU markets and TSCA registration for US; common pitfall is missing safety data sheets leading to customs delays
Related Products under HTS 2934.20.05.00
Santocure TBBS Accelerator
"Santocure TBBS" is a branded form of N-tert-Butyl-2-benzothiazolesulfenamide, a sulfenamide accelerator with the defining benzothiazole ring-system of HTS 2934.20.0500. Widely used in NR and synthetic rubber for optimal scorch safety in tire manufacturing.
TBBS 98% Rubber Accelerator Powder
High-purity (98%) N-tert-Butyl-2-benzothiazolesulfenamide powder specifically formulated for delayed-action vulcanization in rubber compounds. Its benzothiazole ring-system qualifies it under HTS 2934.20.0500 as a named heterocyclic compound used in tire and automotive rubber production.
Runflex TBBS Vulcanization Accelerator
Runflex TBBS is N-tert-Butyl-2-benzothiazolesulfenamide meeting industrial specifications for rubber curing, classified under HTS 2934.20.0500 due to its specific benzothiazole heterocyclic structure. Essential for producing conveyor belts, hoses, and seals.
Benzothiazole TBBS 95% Technical Grade
Technical grade N-tert-Butyl-2-benzothiazolesulfenamide at 95% purity, recognized under HTS 2934.20.0500 for its characteristic benzothiazole ring-system. Used in cost-effective rubber formulations for footwear soles and mechanical goods.