Rose Otto Essential Oil Is Lighter In Color And Thinner In Viscosity Than Rose Co2 Extract Or Rose Absolute. At Cooler Temperatures, Rose Otto Can Solidify. This Does Not Hurt The Integrity Of The Oil. Aromaweb's Working With Thicker Oils Article Provides Tips On How To Re-liquefy The Oil. Appearance Pale Yellow To Orange Red Clear Oily Liquid Flash Point 185.00 °f. Tcc Odor Type Spicy Odor Sweet Fresh Spicy Rose Refractive Index 1.457-1.463 (30 C) Color Colorless To Pale Yellow Viscous Liquid Solubility Fatty Oils, Chloroform Density 0.848-0.863 (3015 C) Sparingly Soluble In Alcohol