Rose Essential Oil CAS 8007-01-0

Bulgarian “otto of rose” is a pale yellow or slightly olive-yellow liquid which separates white or colorless blades of crystals (the so-called stearopten) at temperatures below 21°C. When further cooled, the oil may solidify to a translucent mass, the crystals growing from the surface due to their lower specific gravity. The odorless stearopten amounts to 16 to 22% of the rose oil. 

The odor of Bulgarian rose oil is warm, deep- floral, slightly spicy and immensely rich, truly reminiscent of red roses, often with nuances in the spicy and honeylike notes. The taste is slightly bitter at high concentration, biting-sharp, but becomes very pleasant in extreme dilutions.
Arctander, Steffen . Perfume and Flavor Materials of Natural Origin (p. 650)