What is Rubber Accelerator TBBS NS CAS 95-31-8?

Rubber Accelerator TBBS, also called Accelerator NS, CAS 95-31-8, is N-tert-butyl-2-benzothiazolesulfenamide with the molecular formula C11H14N2S2. It is a sulfenamide accelerator used in sulfur-cured rubber compounds to provide fast cure and high modulus while maintaining good processing safety.

How does TBBS NS compare with Accelerator CBS CZ?

TBBS gives a longer scorch delay than CBS/CZ, so it is safer in high-temperature mixing or long processing cycles. It is slightly more active on an equivalent dosage basis and is often used at a lower level than CBS to reach similar modulus in NR, SBR, BR and their blends.

Why is TBBS used as a replacement for NOBS?

NOBS can generate stable carcinogenic nitrosamines during rubber processing, while TBBS is regarded as a safer alternative that does not produce the same class of nitrosamines. This makes TBBS a common choice in modern tire and rubber goods formulations that need strong acceleration without the NOBS-related regulatory concern.

What are the main applications of Rubber Accelerator TBBS?

TBBS is used in tire compounds, including tread, sidewall and bead areas, as well as hoses, belts, rubber tapes, cable sheathing and other mechanical rubber goods. It is suitable for NR, SBR, BR and compatible blends, and can be used alone or with small amounts of ultra-accelerators.

What are typical specifications for TBBS NS industrial grade?

Commercial TBBS is usually off-white to cream granules or powder with initial melting point of at least 104-105 C, molecular weight about 238.37, and specific gravity around 1.26-1.32. It has very low water solubility and is soluble in many organic solvents; exact assay and residue limits vary by supplier.

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

Rubber Accelerator TBBS, also called Accelerator NS, CAS 95-31-8, is a sulfenamide accelerator supplied for sulfur-cured rubber compounds. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

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

Rubber Accelerator TBBS, also called Accelerator NS, CAS 95-31-8, is N-tert-butyl-2-benzothiazolesulfenamide.

Synonyms: Accelerator NS; N-tert-butyl-2-benzothiazolesulfenamide; TBBS; N-t-butyl-2-benzothiazylsulfenamide; Benzothiazyl-2-tert-butylsulfenamide.

CAS: 95-31-8.

It has the molecular formula C11H14N2S2 and a molecular weight of 238.37 g/mol.

It appears as off-white to cream granules or powder.

It has an initial melting point of at least 104°C and a specific gravity of about 1.26–1.32.

It provides fast cure and high modulus while maintaining good processing safety.

It gives a longer scorch delay than CBS/CZ, so it is safer in high-temperature mixing.

It is a safer alternative to NOBS because it does not produce the same class of nitrosamines.

It is used in tire compounds, including tread, sidewall and bead areas.

It is used in hoses, belts, rubber tapes and cable sheathing.

It is suitable for NR, SBR, BR and compatible blends.

It can be used alone or with small amounts of ultra-accelerators.

It is soluble in many organic solvents and practically insoluble in water.

Confirm appearance, melting point, molecular weight, specific gravity, water solubility, organic solubility and vapor pressure.

Store in a cool, dry, well-ventilated place in tightly sealed original packaging, away from heat, sunlight and moisture.

Confirm packaging with the requested quantity and destination requirements.

The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

For an RFQ, state the intended use, required grade and specification, quantity, packaging, destination and document needs.

FAQ - Technical & Supply Chain

Q:
What is Rubber Accelerator TBBS NS CAS 95-31-8?

A: Rubber Accelerator TBBS, also called Accelerator NS, CAS 95-31-8, is N-tert-butyl-2-benzothiazolesulfenamide with the molecular formula C11H14N2S2. It is a sulfenamide accelerator used in sulfur-cured rubber compounds to provide fast cure and high modulus while maintaining good processing safety.
Q:
How does TBBS NS compare with Accelerator CBS CZ?

A: TBBS gives a longer scorch delay than CBS/CZ, so it is safer in high-temperature mixing or long processing cycles. It is slightly more active on an equivalent dosage basis and is often used at a lower level than CBS to reach similar modulus in NR, SBR, BR and their blends.
Q:
Why is TBBS used as a replacement for NOBS?

A: NOBS can generate stable carcinogenic nitrosamines during rubber processing, while TBBS is regarded as a safer alternative that does not produce the same class of nitrosamines. This makes TBBS a common choice in modern tire and rubber goods formulations that need strong acceleration without the NOBS-related regulatory concern.
Q:
What are the main applications of Rubber Accelerator TBBS?

A: TBBS is used in tire compounds, including tread, sidewall and bead areas, as well as hoses, belts, rubber tapes, cable sheathing and other mechanical rubber goods. It is suitable for NR, SBR, BR and compatible blends, and can be used alone or with small amounts of ultra-accelerators.
Q:
What are typical specifications for TBBS NS industrial grade?

A: Commercial TBBS is usually off-white to cream granules or powder with initial melting point of at least 104-105 C, molecular weight about 238.37, and specific gravity around 1.26-1.32. It has very low water solubility and is soluble in many organic solvents; exact assay and residue limits vary by supplier.

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