This part informs about the physical and chemical properties and hazards of sodium cyanide, and stipulates the terms and definitions of sodium cyanide leakage treatment and disposal, leakage emergency measures, on-site environmental monitoring, leakage on-site treatment and disposal methods, and leakage disposal methods. This section applies to the treatment and disposal of sodium cyanide (solid or solution) when leakage occurs during production, storage, use, operation and transportation.