In Europe, safety data sheets are governed by the EU REACH Regulation and are changing. One of the changes is to align with EU Classification, Labelling and Packaging (CLP). CLP implements the international Globally Harmonised System for standardising the classification and labelling of chemicals (GHS).
Here is the EU OSHA guidance on EU CLP.
In the US, safety data sheets are also changing.
Here is the US Department of Labor OSHA Guide to GHS which refers to the GHS “purple book” and gives a lot of detail.
Here is the US OSHA Fact Sheet on the new US ‘Hazard Communication Standard Final Rule’.