formaldehyde pollutant molecule, flat icon style. atoms shown as circles. known carcinogen. atoms shown as color-coded circles (

formaldehyde methanal aldehyde gas disinfectant formalin preservative volatile indoor carcinogen methylene glycol oxide methyl formol biocide vaccine embalming fixative tissue pollution pollutant flat icon silhouette outline chemical concept abstract stylized illustration isolated shape form symbol pharmaceutical pharma simple chemistry atoms molecule science scientific structure circle line oxygen carbon hydrogen