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.
Feb 15, 2015. Butane, or C4H10, has two structural (also called constitutional) isomers called normal butane, or unbranched butane, and isobutane, or i-butane. According to IUPAC nomenclature, these isomers are called simply butane and 2-methylpropane. As you know, isomers are molecules that have the same molecular formula but different chemical structures. In the case of butane, its two isomers will have these structural formulas