Profile: Qingdao Reehua Yuanhai Biotech Co., Ltd. focuses on developing and marketing hydrocarbon resins (petroleum resins, C5, C9, C5/C9, hydrogenated resins) for adhesives, paints, inks, etc; Gamma Oryzanol, Sodium Hyaluronate for foods, nutritions, cosmetic. C5 Resin is aliphatic hydrocarbon resin which obtained from polymerizing unsaturated aliphatic olefins. It is with low molecular weight and slightly yellow color. C5 Resins are produced from aliphatic crackers like Piperylene and Isoprene, the current major catalyst is AlCl3.