What is added to propane to increase leak detection?

The correct choice is the addition of an odorant to propane to enhance leak detection. Propane is naturally odorless, which poses a significant safety hazard because leaks can go unnoticed. To address this risk, an odorant, typically ethyl mercaptan, is added to propane. This compound has a strong, distinctive smell often compared to rotten eggs, making it easy for individuals to detect even small concentrations of the gas in the air.

The use of an odorant plays a crucial role in promoting safety, as it allows for immediate identification of leaks, prompting quick action to mitigate potential dangers such as explosions or asphyxiation. This practice is standardized and crucial for regulatory compliance in the handling and distribution of LP-gas.