How to store essential oils properly?

Proper storage of essential oils is crucial to maintain their quality, potency, and aromatic properties. As an essential oil supplier, I've witnessed firsthand the impact of improper storage on these precious liquids. In this blog, I'll share comprehensive tips and insights on how to store essential oils correctly, ensuring that they remain in optimal condition for as long as possible.

 

Before delving into storage methods, it's essential to understand the characteristics of essential oils. These oils are highly concentrated plant extracts that contain volatile compounds. These volatile components are what give essential oils their distinctive scents and valued properties. However, they are also sensitive to environmental factors such as light, heat, oxygen, and humidity, which can cause the oils to degrade over time.

 

 Light

Light, especially direct sunlight, can break down the chemical compounds in essential oils. Ultraviolet (UV) rays can cause oxidation and degradation, leading to a loss of aroma and valued properties. For example, citrus essential oils are particularly susceptible to light damage and may turn cloudy, lose their fresh scent, or develop a rancid smell when exposed to sunlight for extended periods.

 Heat

High temperatures can accelerate the evaporation of volatile compounds in essential oils, causing them to lose their potency. Heat can also lead to chemical changes in the oils, resulting in a change in their odor and effectiveness. Essential oils should be stored away from sources of heat, such as radiators, stoves, ovens, or direct sunlight.

 Oxygen

Exposure to oxygen can cause oxidation in essential oils, leading to the formation of free radicals and the breakdown of the oil's chemical structure. Oxidation can result in a change in the oil's color, odor, and valued properties. To minimize oxidation, essential oils should be stored in airtight containers and filled to the brim to reduce the amount of air (headspace) inside the bottle.

 Humidity

Humidity can introduce moisture into essential oils, which can promote the growth of mold and bacteria. Moisture can also cause the oils to become thick and cloudy, affecting their quality and performance. Essential oils should be stored in a dry environment with relative humidity below 60% to prevent moisture from entering the container.

 

The choice of storage container is crucial for preserving the quality of essential oils. Here are some factors to consider when selecting a container:

 Material

a. Glass: Glass is the preferred material for storing essential oils because it is non-reactive and does not absorb the oil's aroma or chemical compounds. Dark-colored glass, such as amber or cobalt blue, provides additional protection against light damage. For bulk storage, some suppliers use stainless steel, but always verify compatibility with each oil type.

b. Stainless Steel: Stainless steel is another option for storing essential oils, particularly for bulk drums or transport containers. It is durable, non-reactive with most essential oils, and provides good protection against light and oxygen. However, for long-term storage of high-phenol or high-acid oils, glass remains the preferred choice.

c. Plastic: Plastic containers are not recommended for storing essential oils for long-term use because they can leach chemicals into the oil and may not provide adequate protection against light, heat, and oxygen. Short-term transport in food-grade plastic may be acceptable, but glass is always preferred for storage.

 Size

The size of the container should be appropriate for the amount of essential oil you are storing. It is best to choose a container that is just large enough to hold the oil, as this will minimize the amount of air space in the container and reduce the risk of oxidation.

 Closure

The container should have a tight-fitting closure to prevent air and moisture from entering. Screw-top lids with polycone or phenolic liners, or euro-dropper caps with a solid outer seal, are ideal for essential oil storage.

 

 Temperature

The ideal temperature for storing essential oils is between 50°F and 70°F (10°C and 21°C). This temperature range helps to slow down the evaporation of volatile compounds and prevent oxidation. Avoid storing essential oils in areas that are subject to extreme temperature fluctuations, such as attics, basements, or garages.

 Light

As mentioned earlier, essential oils should be stored in dark-colored glass containers to protect them from light damage. Store the containers in a cool, dark place, such as a cabinet or drawer. Avoid storing essential oils on windowsills or in areas that are exposed to direct sunlight.

 Oxygen

To minimize oxidation, essential oils should be stored in airtight containers. Make sure to close the container tightly after each use. If you are using a dropper bottle, consider replacing the dropper cap with a tight-fitting lid after each use to prevent air from entering, as dropper inserts can allow more air exchange.

 Humidity

Essential oils should be stored in a dry environment to prevent moisture from entering the container. Avoid storing essential oils in bathrooms or other areas with high humidity. If you live in a humid climate, you may want to consider using a dehumidifier in the storage area.

 

 Citrus Oils

Citrus essential oils, such as lemon, orange, and grapefruit, are particularly sensitive to light and heat. They should be stored in dark-colored glass containers in a cool, dark place. Citrus oils have a relatively short shelf life, typically around 6 to 12 months, so it's important to use them within this time frame. Refrigeration can extend their life, but allow the bottle to warm to room temperature before opening to prevent condensation.

 Floral Oils

Floral essential oils, such as lavender, rose, and jasmine, are also sensitive to light and heat. They should be stored in dark-colored glass containers in a cool, dark place. Floral oils have a longer shelf life than citrus oils, typically around 1 to 2 years when stored properly.

 Spice Oils

Spice essential oils, such as cinnamon, clove, and ginger, are more stable than citrus and floral oils. However, they can still be affected by light, heat, and oxygen. Spice oils should be stored in dark-colored glass containers in a cool, dark place. They have a shelf life of around 2 to 3 years.

 Carrier Oils

Carrier oils, such as coconut oil, jojoba oil, and sweet almond oil, are used to dilute essential oils before use. Carrier oils should be stored in dark-colored glass containers in a cool, dark place. They have a shelf life of around 1 to 2 years (jojoba oil can last up to 5 years due to its natural stability).

 

Label Your Containers: Make sure to label each container with the name of the essential oil, the date of purchase, the date of first opening, and the expiration date if available. This will help you keep track of the oils and ensure that you use them before they expire.

Keep Oils Away from Children and Pets: Essential oils are highly concentrated and can be toxic if ingested. Keep them out of reach of children and pets.

Avoid Mixing Oils: Mixing different essential oils can alter their chemical composition and affect their valued properties. It's best to store each oil separately until you are ready to blend them for a specific formulation.

Check for Signs of Degradation: Regularly check your essential oils for signs of degradation, such as a change in color, odor, or consistency, or the presence of cloudiness or sediment. If you notice any changes, it's best to discard the oil or consult with your supplier for advice.

 

Proper storage of essential oils is essential to maintain their quality, potency, and valued properties. By understanding the factors that affect essential oil storage and following the tips outlined in this blog, you can ensure that your essential oils remain in optimal condition for as long as possible.

As an essential oil supplier, we offer a wide range of high-quality essential oils, including Black Seed Oil Bulk, Clary Sage Flower Oil, and Cinnamon Leaf Essential Oil. If you're interested in purchasing essential oils in bulk, please feel free to contact us at info@inhealthnature.com for more information and to discuss your specific needs. We're here to help you find the perfect essential oils for your business or personal use.

 

References

• Tisserand, R., & Young, R. (2014). Essential Oil Safety: A Guide for Health Care Professionals (2nd ed.). Churchill Livingstone.

  Battaglia, S. (2003). The Complete Guide to Aromatherapy (2nd ed.). International Centre of Holistic Aromatherapy.