![Frog preserved in formaldehyde in a glass jar](https://www.chemicals.co.uk/wp-content/uploads/2022/09/Frod-preserved-in-formaldehyde-scaled-1.webp)
Is Formaldehyde Harmful to Humans?
While formaldehyde is typically safe at very low levels, it’s highly toxic and harmful at concentrations above 100 ppm. Even at a concentration of 50 ppm, formaldehyde can cause potentially life-threatening health issues including a severe pulmonary reaction. Formaldehyde has