What is the specific gravity of propane vapor?

The specific gravity of a gas is a comparison of its density to that of air, with air having a specific gravity of approximately 1.0. Propane vapor, which is a heavier gas, has a specific gravity of about 1.50. This means that propane vapor is 1.5 times denser than air. When propane is released into the atmosphere, it tends to sink and accumulate in low-lying areas because it is heavier than the surrounding air.

Understanding specific gravity is crucial for safety and handling procedures in environments where propane is used, as it informs individuals about the potential behavior of the gas. If the specific gravity is greater than 1, it suggests that the gas will not rise and disperse readily, impacting ventilation and leak detection measures.