SDSs must be supplied by manufacturers, distributors, and importers to all recipients of a chemical substance. The Global Harmonized System for communicating chemical safety standards (which the EU, Canada, and OSHA’s Hazard Communication Standard comply with) mandates that specific information about a chemical substance’s reactivity be provided on all Safety Data Sheets (SDS). The reactivity series acts as a useful summary of information about the potential reactivity of metals, but it does not provide specific information about workplace safety. OSHA and other occupational health and safety agencies recognize chemical substance reactivity as a major workplace hazard. The most reactive element in a standard series is potassium, which reacts violently with water the least reactive is gold, which does not react at all with dilute acids. Elements within the reactivity series are typically ranked based on their reaction to water or a dilute acid. uninhibited) can undergo vigorous polymerization quite easily by themselves when they are heated slightly or exposed to light. Because the reactivity of an element varies depending on the substance it is reacting to, elements ranked in the series are arranged according to their reactions to a common substance. Reactive chemicals are defined as those substances which can, in contact with air, water or other common substances, vigorously or violently give off heat, energy or toxic gases or vapors. Reactivity is the description of how likely a substance is to interact with a second substance. The reactivity series is an empirically constructed series-the more reactive a metal is, the greater its tendency to lose electrons and form positive ions. A chemical interaction refers to the change in the chemical makeup of a substance. Highly reactive substances may present a significant hazard to workers due to the opportunity for potentially dangerous reactions to occur if the substance is not handled with proper precautions. ![]() Worker recognition of the potential chemical reactivity of a substance and the level of hazard associated is an important aspect of workplace safety.
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