Formaldehyde/Formalin 98% pure
Formaldehyde is a naturally occurring organic compound with the formula CH₂O. The pure compound is a pungent-smelling colourless gas that polymerises spontaneously into paraformaldehyde, hence it is stored as an aqueous solution. It is the simplest of the aldehydes. The common name of this substance comes from its similarity and relation to formic acid.