and many others. Also they have a unit converter and an interactive periodic table
The American National Standards Institute (ANSI) Incorporated by Reference (IBR) Portal provides a one-stop mechanism for access to standards that have been incorporated by reference in the U.S. Code of Federal Regulations (CFR). These standards incorporated by the U.S. government in rulemakings are offered at no cost in “read only” format and are presented for online reading. There are no print or download options.
Prudent Practices in the Laboratory provides guidance on planning procedures for the handling, storage, and disposal of chemicals. The book offers prudent practices designed to promote safety and includes practical information on assessing hazards, managing chemicals, disposing of wastes, and more. You can search Prudent Practices for items of interest using this search tool.
Safety and Health Information Bulletins (SHIBs) are one tool OSHA uses to inform internal staff and the public of significant occupational safety and health issues concerning hazard recognition, evaluation, and control.
American Chemical Society (ACS)