What is SADT?
SADT (Self-Accelerating Decomposition Temperature) is the self-accelerating decomposition temperature, which refers to the lowest ambient temperature at which the rate of self-decomposition reaction of organic peroxides gradually accelerates without an external heat source, eventually leading to uncontrolled decomposition. This temperature is a key safety parameter because once the ambient temperature exceeds the SADT, the chemical may decompose rapidly, generating a large amount of heat and gas, leading to explosions or other dangerous situations.
In the industry, organic peroxides with a SADT exceeding 50°C are called room-temperature organic peroxides, while those with a SADT below 50°C are called low-temperature or temperature-controlled organic peroxides.
The SADT of tert-butyl perbenzoate (TBPB) is 60°C. In theory, no special temperature control measures are required at this temperature. However, in actual operation, several other temperature indicators are also paid attention to:
1. **Hazard control temperature**: Generally 5°C lower than SADT, that is, 55°C. This temperature is the highest temperature at which action needs to be taken.
2. **Maximum storage temperature**: Generally 10°C lower than SADT, that is, 50°C. Short-term storage at this temperature usually does not cause safety problems.
3. **Manufacturer recommended storage temperature**: This is the maximum storage temperature recommended by the manufacturer to ensure quality, usually between 30-40°C.
4. **Optimum storage temperature**: For long-term storage and to ensure the best quality, for TBPB (Tert-Butyl Peroxybenzoate), CAS NO. 614-45-9, the optimal storage temperature is 10 to 15°C.