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A substance that irritates the [[skin]] and [[eyes]].
==Key Stage 3==
===Meaning===
[[File:ToxicSymbol.png|right|300px|thumb|The symbol for [[Toxic]] [[chemical]]s.]]
An [[irritant]] is a substance that can cause itching and pain to the [[skin]], [[eyes]] or [[lung]]s.
===About Irritant Chemicals===
: [[Irritant]]s can cause a rash if they get on the [[skin]] without immediately being washed off.
: Some [[irritant]]s are a [[gas]] and may cause '''irritation''' to the [[lung]]s.