The Safety of 2,2′-Bis(2-chlorophenyl)-4,4′,5,5′-tetraphenylbiimidazole

2,2′-Bis(2-chlorophenyl)-4,4′,5,5′-tetraphenylbiimidazole (CB108) is a fluorene-based molecule that has been widely studied for its potential use as a material in organic electronics, specifically in organic thin-film transistors (OTFTs).
Its unique properties, such as high mobility and good stability, have made it an attractive option for use in electronic devices.
However, the use of CB108 in electronic devices also raises concerns about its safety.

2,2′-Bis(2-chlorophenyl)-4,4′,5,5′-tetraphenylbiimidazole is classified as a class 2 biological dust according to the Dutch Working Conditions Act (Arbouwet), which means that it is considered to be harmful if inhaled.
This is based on studies that have shown that CB108 can cause respiratory irritation and lung damage when inhaled.
In addition, there is evidence to suggest that CB108 may be a potential skin irritant, with some studies showing that it can cause skin redness and itching.

Exposure to CB108 can occur during the manufacturing process, as well as during the use and disposal of products containing the substance.
It is important to take steps to minimize exposure and protect the health of workers and the general public.
This can include the use of personal protective equipment, such as respirators, and proper handling and disposal of the substance.

In addition to the potential health risks associated with exposure to CB108, there are also concerns about its environmental impact.
CB108 is not easily biodegradable and can persist in the environment, potentially causing harm to wildlife and ecosystems.
Therefore, it is important to take steps to minimize its release into the environment and promote the safe disposal of products containing CB108.

Overall, while CB108 has promising properties that make it an attractive option for use in electronic devices, it is important to consider the potential risks to human health and the environment associated with its manufacture, use, and disposal.
Further research is needed to fully understand the health and environmental impacts of CB108, and measures should be taken to minimize exposure and protect the health of workers and the public.