Penta is a kind of solid, high-melting crystalline material. It is four-functional polyalcohol with all primary hydroxyl groups. Penta is key raw material for alkyds and many types of paint. Featuring in enhancing hardness and dryness, it is also used in a number of esters, such as rosin esters for adhesives and painting inks，fatty acid esters for synthetic lubricants, and acrylic acid esters for radiation curing. In addition, penta is used in antioxidants. The micronized form is used in fire-retardant materials and PVC stabilizers.