Overview
2-(tert-Butylaminothio)benzothiazole (CAS 95-31-8 ), commercially known as TBBS, is a delayed-action sulfenamide accelerator used in the rubber vulcanization industry.
It controls the rate and onset of crosslinking during rubber processing, giving manufacturers a reliable processing safety window before cure begins.
TBBS is the accelerator of choice in tire manufacturing, where it is used in tread compounds, sidewalls, and carcass plies to deliver consistent cure rates and mechanical performance.
In industrial rubber goods, including conveyor belts, seals, hoses, and gaskets, it enables processors to balance scorch safety with efficient vulcanization at production temperatures.
It performs effectively in natural rubber, SBR, and blended systems, often combined with secondary accelerators such as DPG or TMTD to fine-tune cure profiles.
Footwear and technical molded rubber components also rely on TBBS where dimensional accuracy and surface quality depend on controlled crosslink density.
TBBS is supplied as an off-white to pale yellow powder or granules, with granular form preferred in automated dosing and mixing operations to reduce dust exposure.
Standard commercial grades meet specifications set by major rubber industry quality frameworks, including purity benchmarks typically at 95% minimum active content.
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Physical Properties
| Melting Point | 105 °C |
| Boiling Point | 344.1±25.0 °C(Predicted) |
| Density | 1.29 g/cm³ @ Temp: 25 °C |
| Flash Point | 165°C |
| Water Solubility | 1.74mg/L at 20℃ |
| Vapor Pressure | 0Pa at 25℃ |
| Refractive Index | 1.5500 (estimate) |
| Log P | 3.36 at 25℃ |
Safety & Handling
Warning GHS07 GHS09 GHS08 Hazard Statements H317 May cause an allergic skin reaction H373 May causes damage to organs through prolonged or repeated exposure H400 Very toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects Precautionary Statements P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P391 Collect spillage. P501 Dispose of contents/container in accordance with local regulations. P302+P352 IF ON SKIN: Wash with plenty of water. P333+P317 Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse.
Trade & Regulatory
| HS Code | 29342000 |
Other Names
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Chemical Properties
- CAS Number
- 95-31-8
- EC Number
- 202-409-1
- Mol. Weight
- 238.4
- HS Code
- 29342000
- Category
- Catalysts & Catalyst Precursors