Are formaldehyde-based products hazardous?
Using formaldehyde as a building block, chemical processes bind the free formaldehyde in various molecular chains, which usually render the formaldehyde itself harmless. High-grade resin, for example, bonds formaldehyde to such an extent that the free formaldehyde content in wood-based products is well below the strictest norms. Low-grade resin sometimes fails to achieve this.