Muscle cramps may be brought on by many conditions or activities, such as: 1  Exercising, injury, or overuse of muscles. 2  Pregnancy. Cramps may occur because of decreased amounts of minerals, such as calcium and magnesium, especially in the later months of pregnancy.  Exposure to cold temperatures, especially to cold water.
Butane is a colorless gas with a faint petroleum-like odor. For transportation it may be stenched. It is shipped as a liquefied gas under its vapor pressure. Contact with the liquid can cause frostbite.
After the contents of the container have been fully exhausted, for practical purposes, the can still retains butane vapor. In the case of the most common size of butane cooking gas container, there would be approximately 520 millileters of butane gas at or slightly above atmospheric pressure remaining in the can.