Melaleuca alternifolia Ingredients: Pure tea tree oil Aroma: Potent, warm, spicy Attributes: Cleansing, purifying, renewing Extraction Method: Steam Distilled from leaves and twigs Purifying Room Blend: Add 1 drop each of tea tree oil and grapefruit oil, along with 10 drops of lemon oil to a diffuser and enjoy. Physical Characteristics: Specific Gravity: 0.888-0.909 Refractive Index: 1.475-1.482 NOTE: Dropper insert is not included with the 16 oz. size bottles. NOW Essential Oils are analytically tested for identity, purity and adulteration to assure the highest quality.