Lemon Essential Oil is a refreshing, cheerful and uplifting oil that smells like fresh lemon peel. Extracted using a cold-pressed extraction method from the fresh fruit peel. Physical Characteristics Specific Gravity: 0.849-0.855Refractive Index: 1.473-1.476 NOW Essential Oils are analytically tested for identity, purity and adulteration to assure the highest quality. Suggested Use and Storage For aromatherapy use. For all other uses, carefully dilute with a carrier oil such as jojoba, grapeseed, olive, or almond oil prior to use. Please consult an essential oil book or other professional reference source for suggested dilution ratios. Natural essential oils are highly concentrated and should be used with care. Why not try this Cheer Up Buttercup Blend - Add 1 drop of each lime oil and grapefruit oil, 2 drops of lemon oil and 6 drops of tangerine oil. Add to a diffuser or burner and enjoy. Precautions Keep out of reach of children. Avoid contact with eyes. If pregnant or nursing, consult your healthcare practitioner before using. Do not use on skin. Reacts strongly to sunlight and other sources of ultraviolet light.