Physiological Function and Application Evening primrose Oil Extracted from the seeds of Primrose plant by SFE-CO2 method. Benefits: Reduces cholesterol, prevents and cures of arteriosclerosis, coronary heart disease, diabetes and cardiovascular diseases; Storage Evening Primrose Oil is sensitive to oxidation, and is there saturated with nitrogen. The product should be stored in closed drums protected from heat and light. The product should be stored in closed drums protected from heat and light. Items Specification Linoleic Acid C18:2 =70% Gamma Linoeic Acid =9% / &10% C16:0 5.5%~7.0% C18:0 1.0%~3.0% C18:1 6.0%~15.0% Color Light yellow Appearance Clear oily liquid Acid Value =1.0mg KOH/g Peroxide Value =3.0meq/kg Iodine Value 135~165 Saponification Value 185~200 Specific Gravity 25°C 0.915~0.935 Refractive Index 1.427~1.483 Unsaponifiable Matters =2.0% Moisture =0.05% Heavy Metals =5ppm Pesticide Residue Undetected (according to ph EUR) Residual Solvents Undetected (according to ph EUR) Organic Volatile Impurities Undetected (according to ph USP 1