Formaldehyde Solution: Overview, Uses, and Safety Considerations Formaldehyde is a highly reactive and colorless gas with a strong, pungent odor. It is commonly used in various industries and scientific fields. When dissolved in water, it forms a solution known as formaldehyde solution or formalin, which typically contains around 37-40% formaldehyde by weight, with the remaining port... https://scienceandlaboratoryexp.com/product/formaldehyde-solution/