After posting a Flammable & Combustible Liquid tool I occasionally use a few weeks ago, some of the feedback I received included requests for similar provisions on the United States Department of Transportation (US DOT) and United Nations Globally Harmonized System of Classification (GHS).
The US DOT classifications come from the Code of Federal Regulations (CFR) Title 49, 173.120. Cornell Law School offers access to the regulation here: https://www.law.cornell.edu/cfr/text/49/173.120.
The United Nations GHS system resembles the NFPA flammable liquid classifications, except the thresholds for Flash Point and Boiling Point differ slightly, are metric-based, and have different Categorization labels. OSHA (Occupational Safety and Health Administration) offers a guide on the GHS System here.
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Joseph Meyer, PE, is a Fire Protection Engineer in St. Louis, Missouri. See bio on About page.