it is because it is harmful and can burn the skin
bleach is hazardous because if it gets into your body system it can kill you easily by eating up your insides.
poison,extremely harmful chemicals have been put in it,so don't eat get in skin or eyes
harmful
You will have a large x with a h standing for harmful
You can usually find hazard symbols near dangerous materials or areas like maybe you would find lots of radioactive hazard symblols in chernobyl, where the atomic explosion happened.
For the UK - See related link.
hydrogen is corrosive and irritant
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Would you find an airport symbol on the globe
The hazard sign is recognisable by its shape. It will have a distinctive colour, often reflective, around its edge. These may vary by region and you can find local hazard signs in a highway code handbook.
Not everything has a symbol for it. The concept of fume safety, if it is a concept, does not have a specific symbol.
You would find it in the fire and explosion hazard data section.
go to bleach websites
Its a chemical hazard
in a science lab or on a can dof spray to do with oxygen