Formaldehyde-based resins are synthetic materials created by combining formaldehyde with various organic compounds. These resins are widely used in the production of adhesives, coatings, and composite wood products, such as particleboard and plywood. Their strong bonding properties and resistance to moisture make them popular in construction and furniture manufacturing. These resins can be categorized into different types, including urea-formaldehyde and phenol-formaldehyde resins. While they offer many benefits, concerns have been raised about the potential health effects of formaldehyde emissions, leading to regulations and the development of low-emission alternatives in various industries.