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.
Jupiterimages/Photos.com/Getty Images. Methyl ethyl ketone, also referred to as butanone, is a solvent used in the production of synthetic rubber, paraffin wax, glues, lacquers, varnishes and paint remover.A colorless liquid that has an acetone-like odor, itâs highly flammable and must be disposed of properly to protect people and the environment.isks. According to the U.S. Environmental Protection Agency (EPA), methyl ethyl ketone can cause âirritation to the eyes, nose and throatâ when inhaled for a short period.