Granular oxygen is solid oxygen. Sodium percarbonate can be used to produce H2O2, commonly known as hydrogen peroxide. It is a colorless liquid at room temperature, difficult to ionize and easy to decompose. As a classic chemical product, industrial production began more than 100 years ago. With the growth of social demand, especially the need of ecological environment protection, hydrogen peroxide has been favored by people in recent years and is called "green oxidant".