This standard informs about the physical and chemical properties and hazards of aldehydes, and stipulates emergency measures in the event of aldehyde leakage, leakage site treatment methods, and leakage site disposal methods. This standard applies to the storage, production, use, operation and transportation of aldehyde substances included in Category 3, Category 4, Item 4.1, Category 6, Item 1 and Category 8 in GB 12268-2012. Treatment and disposal in case of leakage.