الفهرس 
Natural soutcesOnly 14 pages are availabe for public view
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Abstract
There is a nearly endless list of chemicals and biological agents that can be injurious when inhaled, ingested or absorbed through the skin. Some drugs produce injury in the course of therapy and others are introduced accidentally or intentionally into the body. The use of formalin (40% solution of formaldehyde) as a food preservative may be an example of the later group. Formalin, a powerful preservative, is not permitted to be added to food directly. However, any food may contain formaldehyde derived from any wet strength wrapping containing formaldehyde based resin or of plastic food containers made from any resin of which formaldehyde is a condensing component. In contrast to extensive attention paid to systemic toxic effects of formaldehyde, studies concerning the potential mutagenicity of formaldehyde are still with conflicting results.