You're referring to Safety Data Sheets (SDSs), which were previously called Material Safety Data Sheets (OSHA revised the name, required information, and format in 2012). I applaud your desire to have an accurate SDS book, since it's a key OSHA requirement and an important part of a safety program. My suggestion is to compile an inventory of chemical products used in your facility, which is also a requirement under OSHA's Hazard Communication Standard. Make sure you include products used in the office area and those purchased at retail stores. You can then double-check that you have an SDS for each product on the list and can request missing SDSs from the appropriate vendor. [You can download a sample inventory form at https://prnt.in/hazcommprogram.]