The term Material Safety Data Sheet (MSDS) is being replaced by just SDS. In most cases you can retrieve an MSDS via a google search that includes the product name or CAS number of the substance. All major chemical product suppliers provide SDSs online.
Oklahoma State University has a comprehensive list of online chemical safety resources.
You can search the PSU MSDS database.
There is also a bio-safety equivalent: Pathogen Safety Data Sheets (PSDSs)