A chemical database is like a big box full of information about different chemicals. It tells you about what they are made of, how they look, and what they do.
When scientists discover a new chemical, they can put it into the database so that other scientists can learn about it too. It's like adding a new toy to your toy box, but instead of toys, it's information!
Chemical databases also help scientists figure out how different chemicals react with each other. It's like playing with different toys to see how they fit together.
Overall, a chemical database is a helpful tool that scientists use to learn about chemicals and how they work in our world.