What type of gas is typically contained in a propane cylinder?

Propane cylinders are specifically designed to store and transport propane gas, a hydrocarbon known for its use as a fuel in heating, cooking, and other applications. Propane is a three-carbon alkane (C3H8) and is odorless in its natural state but is often mixed with an odorant to make leaks detectable.

The distinction between propane and other types of gas is important. Natural gas, primarily composed of methane (C1H4), is delivered through pipelines and is not typically stored in portable cylinders. Methane is indeed a common fuel gas but is not the focus when discussing propane cylinders. Butane, while related and sometimes stored similarly, has different characteristics and uses compared to propane; it is heavier than propane and is often found in butane-only cylinders or mixed with propane in portable fuel applications.

Therefore, the correct answer highlights the specific gas that is actually contained in propane cylinders, ensuring clarity in understanding gas types and their storage contexts.