Safety Data Sheets (SDS) are guides to hazardous materials. These are often created and distributed by chemical manufacturers, distributors, or importers.
In 2012 the Occupational Safety & Health Administration required SDSs to be presented in a standardized 16 section format (you can see an example here). These sections include:
Below are some resources for finding MSDSs or SDSs. You can find similar property information in databases like SciFinder Scholar.