formaldehyde methanal molecule. important indoor pollutant. skeletal formula.

formaldehyde methanal molecule important indoor pollutant skeletal formula formaldehyd formol formalin formaline aldehyde cancer carcinogenic inhalation lung toxic poison paraformaldehyde disinfectant preservative trioxane methanol resin biocide vaccine methenamine fixative embalming carbon hydrogen oxygen atoms atomic molecular compound composition chemical chemistry structure line drawing flat icon