Which compound is typically found in building materials such as particle board?

Formaldehyde is commonly used in the production of building materials, especially in particle board and other composite wood products. This compound serves as a bonding agent, allowing the layering of wood fibers or particles to form a solid material. Particle board is made by compressing wood chips, sawmill shavings, or sawdust along with a resin that typically contains formaldehyde. While it enhances the durability and structural integrity of the board, formaldehyde can release volatile organic compounds (VOCs), which may affect indoor air quality and health.

The other compounds listed are not used in the same way. Lignin is a natural polymer found in the cell walls of plants, contributing to their structural integrity, but it is not used as a binding agent in particle board manufacturing. Gypsum, primarily used in wallboard and plaster applications, does not have the same adhesive properties as formaldehyde. Vermiculite is a mineral used primarily for insulation and soil conditioning, but it does not play a role in the composition of particle board.