Directive 67/548/EEC is a rule that was created a long time ago by grown-ups in Europe to make sure that if someone makes or uses chemicals, it won't hurt the people, plants or animals around them.
The rule is like a very big book with many pages that explain how chemicals should be made, how they should be used safely, and what to do if there is ever an accident. It's important because some chemicals can be very dangerous, and without these rules, people might get sick or hurt.
So, adults who make or use chemicals must follow the rules in the big book carefully. They have to tell everyone how to use the chemicals safely, and they have to make sure everyone knows what to do if something goes wrong.
This way, everyone can be protected from the things that might be harmful, and we can all stay happy and healthy!