Mono Pentaerythritol (also known as PETP; tetramethylolmethane, and THME) is a polyhydric alcohol that contains four primary hydroxyl groups. It has the formula C5H12O4 and is a white, odourless, crystalline solid however it can also be a white, crystalline free-flowing powder. It is moderately soluble in cold water, is freely soluble in hot water, and is slightly soluble in alcohol. It is a building block for the synthesis and production of explosives, appliances, plastics, paints, cosmetics, and many other important chemicals. Its primary role in industry is as a chemical intermediate. There are many grades of Pentaerythritol available commercially but Mono Pentaerythritol has the largest market share as it accounts for approximately 85% of worldwide sales. It is composed of 98% pure Mono Pentaerythritol.