is 52.73 KB, has a resolution of 1024x1024 pixels and was uploaded on October 25, 2018 @ 2:42 pm by user: alicild. It is filed under the tags: hazard symbol, laboratory, trefoil, radiation, sign. Click the blue button at the top to freely download: Frie Ionizing Radiation Symbol Radioactive Decay Biological Hazard png.