When are "No Smoking" signs required in relation to hazardous materials?

The requirement for "No Smoking" signs is particularly crucial in rooms where hazardous materials are stored due to the inherent risks associated with flammable substances. Smoking in proximity to hazardous materials can lead to ignition sources that greatly increase the potential for fires or explosions. Proper signage helps to mitigate these risks by reminding personnel and visitors of the potential dangers and the importance of maintaining a safe environment.

In laboratories where hazardous materials are used or stored, it's critical to establish clear safety protocols, and "No Smoking" signs serve as an essential reminder of these protocols. Areas such as kitchens and dining areas, while they may present certain risks, are generally not classified as hazardous material storage locations in the context of this question. Similarly, while food preparation areas have their own safety considerations, they are distinct from spaces where the specific storage of hazardous materials takes precedence. Overall, keeping a consistent message regarding smoking restrictions in these high-risk areas is a fundamental aspect of maintaining a safe laboratory environment.