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    HomeProductsSpecialty ChemicalsRubber Auxiliaries & AntioxidantsRubber Accelerator TBBS (NS) CAS 95-31-8
    • Rubber Accelerator TBBS (NS) CAS 95-31-8

    Rubber Accelerator TBBS (NS) CAS 95-31-8

    Rubber Accelerator TBBS (CAS 95-31-8), commercially known in the industry as Accelerator NS, is a premium delayed-action sulfenamide accelerator utilizing its specific steric hindrance to provide exceptional scorch safety during processing. Chemically identified as N-Tert-Butyl-2-Benzothiazole Sulfenamide, this cream-colored to light yellow powder (or granule) functions to delay the onset of vulcanization (scorch) while maintaining a fast high-cure rate once the activation temperature is reached. As a non-staining, non-discoloring accelerator, it is widely regarded as the superior, non-toxic alternative to NOBS (MBS). It is extensively integrated into the manufacturing of tires (treads and carcasses), conveyor belts, hoses, and industrial rubber products where high processing safety is required to prevent premature curing. We ensure bulk supply capabilities for this material, providing access to competitive factory pricing and customized specifications to meet specific physical forms (e.g., Powder, Oiled Powder, or Granules for low dust). Full technical documentation, including MSDS, TDS, COA, is available to support compliance and safety protocols.

    • CAS: 95-31-8
    • Synonyms: Accelerator NS, N-tert-butyl-2-benzothiazolesulfenamide, TBBS, N-t-butyl-2-benzothiazylsulfenamide, Benzothiazyl-2-tert-butylsulfenamide
    • Einecs: 202-409-1
    • Molecular Formula: C₁₁H₁₄N₂S₂
    • Grade: Industrial Grade
    • Package: 25 kg bag (standard); 500 kg / 1000 kg big bag optional (customizable)
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    Product Description

    TBBS is commonly used as a primary or secondary accelerator in carbon-black reinforced rubber compounds. It helps achieve high modulus and good mechanical performance while maintaining processing safety, which is why it is frequently selected for tire compounds and other demanding rubber goods.

    1 Physicochemical Properties (Typical)
    2 Applications
    3 Storage Conditions
    4 Safety Precautions

    Physicochemical Properties (Typical)

    Typical values for TBBS (granule/powder). Final specs follow COA by batch.

    ItemTypical Value / Specification
    AppearanceOff-white to cream granule or white/off-white solid
    CAS95-31-8
    EC (EINECS)202-409-1
    Molecular formulaC₁₁H₁₄N₂S₂
    Molecular weight238.37 g/mol
    Melting point (initial)≥ 104°C (typical spec)
    Specific gravity1.26–1.32 (typical)
    Water solubilityPractically insoluble / very low (mg/L level reported)
    Solubility (organic)Soluble in many organic solvents (e.g., acetone/ethanol/toluene etc.)
    Vapor pressureVery low (reported in EU-RAR datasets)

    Applications

    • Tire compounds (tread/sidewall/bead areas depending on formulation)
    • Hoses, belts, rubber tapes, cable sheath and other mechanical rubber goods
    • NR / SBR / BR and compatible compound systems (lab trial recommended for final dosing)

    Storage Conditions

    • Store in a cool, dry, well-ventilated place, in tightly sealed original packaging.
    • Keep away from heat sources, direct sunlight, moisture, and incompatible chemicals.
    • Avoid dust generation; keep containers closed when not in use.
    • Typical shelf life: 12 months (depends on packaging & warehouse conditions).

    Safety Precautions

    • Avoid inhalation of dust; use local ventilation and respiratory protection if needed.
    • Wear chemical goggles/safety glasses and protective gloves to prevent eye/skin contact.
    • In case of eye contact, rinse with water for at least 15 minutes; seek medical advice if irritation persists.
    • Wash hands after handling; keep away from food and drinking areas.
    • SDS available upon request.

    FAQ - Technical & Supply Chain

    • Q:

      How does Rubber Accelerator TBBS (NS) CAS 95-31-8 compare to Accelerator CBS (CZ)?

      A: TBBS (NS) offers roughly 10% greater scorch safety (longer induction time) than CBS (CZ), making it safer for processing rubber compounds at higher temperatures or during long mixing cycles, while still providing a similarly fast cure rate and high modulus.
    • Q:

      Is TBBS considered an eco-friendly replacement for other accelerators?

      A: Yes, TBBS is the standard industry replacement for NOBS (MBS), which produces carcinogenic nitrosamines. TBBS does not generate stable carcinogenic nitrosamines, making it a compliant choice for modern, safe rubber manufacturing.
    Documents

    Documents and Product Support

    For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.

    • COA for batch-based quality reference
    • TDS for key physical and chemical information
    • SDS / MSDS for handling, storage, and safety reference
    • Packing information for sample, trial, and bulk orders
    • Technical communication based on application and specification requirements
    Quotation

    Information to Confirm Before Quotation

    Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.

    • Product name and CAS number
    • Application or intended end use
    • Required purity, grade, or specification
    • Sample quantity, trial order, or bulk demand
    • Preferred packing form or net weight
    • Destination country or port
    • Required documents or compliance expectations
    Storage & Handling

    Packaging, Storage, and Handling Notes

    Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.

    Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.

    Supply Support

    Sample, Bulk Order and Repeat Supply Support

    Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.

    For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.

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    Polymer Additive Rubber Accelerator Rubber Auxiliary Vulcanization Accelerator

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