I'm really surprised this isn't already encoded but while we are at it let's also encode a symbol for non-ioninzing radiation, laser hazard, explosion hazard, strong magnetic field, chocking hazard, corrosion, slippery floor, oxidising, carcinogen and chemical weapon symbols just to name the most relevant. Other ones would include uv light, frezzing hazard, hand in the middle of cogs, foot or hand under machinery, battery hazard, washing hands, fragile symbol, crane hazard, suffocation, high temeperatures and probably some I missed.
