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Cette page répertorie différents isomères, c’est-à-dire des molécules qui partagent la même formule brute.

CH₂O₂ est la formule brute des isomères suivnats :

acide méthanoïque ou acide formique, numéro CAS 64-18-6 ;
dioxirane, numéro CAS 157-26-6.

CH2O2