Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Formaldehyde
Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026
Formaldehyde: A pungent gas, with the chemical formula HCHO, used as an antiseptic, disinfectant, and especially today as a fixative for histology (the study of tissues under the microscope).
Formalin is a 37% aqueous (water) solution of formaldehyde.
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