Toxicology
Formaldehyde is a nearly colorless gas with a pungent, irritating odor even at very low concentrations (below 1 ppm). Because the pure gas tends to polymerize, pure formaldehyde is not sold commercially. It is most commonly available as formalin, a mixture of formaldehyde and water (usually 37g of formaldehyde gas to 100 mL solution. 10% to 15% of methanol is added to the aqueous solution of formaldehyde as a stabilising agent to impede polymerization. It is thus important that clinicians be aware of methanol co-intoxication after ingestion of formalin. However, there exist aqueous solutions of formaldehyde referred to . . .
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