See soorce fer Chemical substance

[[Image:Kochendes wasser02.jpg|thumb|right|Steam an liquid watter are twa furms o the same chemical substance, [[H2O]].]]

In [[chemistry]], a '''chemical substance''' is  a furm o [[matter]] that haes constant [[Chemical compoond|chemical composeetion]] an characteristic properties.<ref>{{GoldBookRef |title=Chemical Substance |file=C01039}}</ref> It cannae be separatit intae components bi pheesical separation methods, i.e. wioot breakin chemical bonds. It can be solid, liquid, gas, or plasma.

==References==
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[[Category:Chemistry]]
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