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What is the principal safety concern regarding the use of propane gas?

  1. High pressure storage

  2. Risk of explosion

  3. Long storage requirements

  4. Odourless nature

The correct answer is: Risk of explosion

The principal safety concern regarding the use of propane gas is the risk of explosion. Propane is highly flammable, and when mixed with air in certain proportions, it can lead to an explosive atmosphere if an ignition source is present. This characteristic is particularly dangerous in enclosed spaces where propane can accumulate and reach explosive levels, potentially causing significant harm to individuals and property. While high pressure storage is an important aspect of handling propane, safety protocols are generally in place to manage this risk. Long storage requirements are not a concern specific to propane as it has a long shelf life when properly stored. The odourless nature of propane is a concern due to the difficulty in detecting leaks; however, an added odorant (usually ethyl mercaptan) is mixed with propane to allow for early leak detection, mitigating this risk. Thus, the most significant concern remains the potential for explosion when propane gas is mishandled or improperly contained.