At a glance: This is one of the most common signs you’re likely to see in a lab. The symbol denotes a General Warning and acts as a broad reminder that the area you’re working in is likely to contain hazards and risks and you should work accordingly.

The red frame around the white diamond contains a black shape like a rolling pin missing one handle. This symbol indicates: The red frame around the white diamond contains a black circle resting on a black line with black flames on top of the black circle. It looks like the circle is on fire.