Which statement is correct regarding leaking refrigerant R-12?

The correct statement regarding leaking refrigerant R-12 is that it will cause frostbite if it touches skin. R-12, also known as dichlorodifluoromethane, is a refrigerant that operates at low temperatures, allowing it to easily absorb heat. When it escapes as a gas or leaks in a liquid form, it can cause rapid cooling upon contact with skin, leading to frostbite. This risk is particularly acute at temperatures below its evaporation point, where exposure can freeze skin tissues, leading to serious injury.

The other options are not accurate regarding R-12. It is not safe to touch without protection because of the potential for frostbite and the harmful effects during exposure. R-12 does have implications for human health; prolonged exposure can lead to respiratory ailments or discomfort. Furthermore, refrigerant R-12 is known to be harmful to the environment due to its ozone-depleting properties, which contradicts the claim that it is harmless.