Okay, so imagine that there are different things around us that can be harmful if we are around them too much or use them in the wrong way. These things are called chemicals and they are found in things like cleaning products, medications, and even in the air we breathe.
Because some chemicals can be dangerous, grown-ups called regulators make rules to keep us safe from them. These rules are called regulations, and they tell us how much of a chemical is allowed to be used or how it should be used so that we stay safe.
Regulators also test and study different chemicals to figure out how they can affect us. They look at things like how much of a chemical it takes to make us sick or how it can harm the environment. This helps regulators decide which chemicals are safe to use and which ones should be not used because they could harm us or the planet.
So the regulation of chemicals is all about making sure that the things around us that have chemicals are safe to use and don't hurt us or our world.