Blue Tansy essential oil, which comes from the annual yellow-flowered Mediterranean plant, is high in chamazulene and sabinene. An important oil in the doTERRA Deep Blue blend, Blue Tansy oil is soothing to mind and body. Packing : A 10 ML pack Shelf Life :24 months Color and Odor :Blue-indigo liquid with flowery and fruity odor Country of Origin :Morocco Method of Extraction :Steam Distillation Specific Gravity @ 20 °C :0.87 – 0.92 Optical Rotation @ 20 °C :NA Refractive Index @ 20 °C :1.48 – 1.49 Main components :Chamazulene, Beta-Caryophyllene, Sesquisabinene-B, Germacrene – B, Sabinene Solubility :Insoluble in Water, soluble in oils and alcohols Blends with :Blends well with essential oils of Sage, Parsley and Thyme ToMix with any other base oils : Use a co-solvent like fractionatred coconut oil, alcohol or polysorbate 80 Blue tansy essential oil contains a high proportion of sesquiterpenes and chamazulene (the blue pigment), which make it heavier and more viscous. Essential oils are mostly non-polar terpenes, but some of blue tansy’s constituents (like chamazulene and bisabolol derivatives) have different solubility behaviors. IMPORTANT: The striking blue color in Blue Tansy Oil comes from chamazulene, a compound formed during steam distillation of the plant. Fresh oil usually appears inky blue to dark sapphire. Over time, exposure to light, air (oxygen), and heat can cause oxidation and chemical shifts in chamazulene and other sesquiterpenes. This oxidation often shifts the oil’s color toward blue-green or greenish hues. Storage in clear glass bottles or in warm conditions accelerates this process. A shift from blue → green alone doesn’t necessarily mean the oil has gone “bad”. Suggestion: Refridgerate the product