What color is the propane gas commonly used for safety identification?

Propane gas is commonly odorized with a distinct smell, often described as resembling that of rotten eggs. This odorization is a critical safety measure designed to alert users to the presence of gas leaks, as propane itself is colorless and odorless in its natural state. The safety measure is essential for preventing accidents, as it enhances the ability of individuals to detect gas leaks before they can lead to hazardous situations such as explosions or asphyxiation.

While colors like blue, green, and red may represent other substances or purposes in the gas industry, they are not associated specifically with the safety identification of propane. The distinct odor is the key characteristic that ensures safety and awareness when handling and using propane gas.