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Although essential oils will not turn rancid as containing fatty acids will, they do deteriorate and oxidize their therapeutic properties over time. By storing your essential oils properly, you will prevent premature deterioration.
Too much heat or sunlight
can impact the quality of the oil. Both heat and sunlight can change the chemical composition of the oil. Too much heat can cause the oil to evaporate more quickly, making it less effective. Heat and sunlight destroy essential oil over time. Don’t store your essential oils near a heat source or in direct sunlight, as repeated exposure to heat and sunlight cause deterioration. Keep them somewhere dark and relatively cool, such as inside a box that is in turn stores in closet.
Essential oils are highly flammable and should be stored away from open flames. They can have flashpoints ranging from 100 to 215 degrees Fahrenheit (37 to 102 Celsius), which means that most are classified as flammable. Because of this, they need to be stored and used with fire safety in mind.
Be aware of each essential oil’s shelf life. Check the shelf life for each essential oil you purchase and use it accordingly. Some oils retain potency for as little as six months, while others remain fully potent for years. Please note that, when the essential oils begin thicken, smell more acidic, or take on a cloudy appearance, they are beginning to oxidize.