ISO 11402 is an international standard for the determination of free formaldehyde content in phenolic, amino and condensed Resin. It provides three different detection methods for different types of Resin products. These methods allow accurate measurement of free formaldehyde content in Resin, providing an important basis for quality control, environmental compliance and product safety assessment. The test results of this standard reflect the actual free formaldehyde level in Resin at the time of determination, providing scientific guidance for Product Research & Development and production process control in related industries.