How to Store Essential Oils Correctly: Protecting Potency, Purity and Safety
Essential oils are highly concentrated plant extracts, valued for their aromatic and therapeutic properties. However, these delicate natural substances can deteriorate if they are not stored correctly. Exposure to heat, light, air and moisture can alter their chemical composition, reducing effectiveness and, in some cases, increasing the risk of skin irritation.
Proper storage is essential for maintaining the quality, safety and longevity of your essential oils—whether you are a professional aromatherapist, student, or everyday user.
Why Proper Storage Matters
Essential oils are made up of volatile aromatic compounds, which means they can evaporate or oxidise over time. Poor storage may lead to:
· Reduced therapeutic value
· Altered aroma
· Increased oxidation
· Skin sensitisation risks
· Shortened shelf life
By storing essential oils correctly, you preserve both their integrity and their investment value. Plus, they are expensive!
The Golden Rules of Essential Oil Storage
Keep Oils in Dark Glass Bottles: Essential oils should always be stored in amber, cobalt blue, or dark green glass bottles. These coloured bottles help protect oils from ultraviolet (UV) light, which can break down delicate compounds.
Avoid: Clear glass or plastic containers, as they offer poor protection and may interact with the oil.
Store Away from Heat and Sunlight: Heat speeds up oxidation and can cause essential oils to degrade more quickly. Store oils in a cool, stable environment away from: Windowsills, Bathrooms with fluctuating humidity, Cars, Heaters or kitchen stovetops
Ideal storage temperature: Generally below 25°C (common in many Australian homes, air-conditioned storage may be beneficial during hotter months).
Always Seal Bottles Tightly: Oxygen exposure contributes to oxidation. Essential oils should be capped immediately after use to minimise air contact.
Tip: Ensure the bottle lid is clean and secure to prevent evaporation or leakage.
Reduce Moisture Exposure: Water contamination can compromise oil quality. Avoid storing oils in humid spaces and never allow water to enter the bottle.
Use the Original Bottle When Possible: Manufacturers often package oils in bottles specifically designed for stability. Transferring oils unnecessarily may increase contamination risks.
Should Essential Oils Be Refrigerated?
Some oils—particularly citrus oils such as lemon, orange and bergamot—oxidise more quickly and may benefit from refrigeration, especially in warm Australian climates.
Important: If refrigerating, allow oils to return to room temperature before opening to prevent condensation inside the bottle.
Shelf-Life Guide: Different oils have different lifespans:
· Citrus oils: Approximately 1–2 years
· Most floral and herb oils: Around 2–4 years
· Resins and woods (e.g. sandalwood, patchouli): Often improve with age and may last much longer
Always label bottles with the purchase or opening date.
Safety Around Children and Pets
Essential oils should be stored securely out of reach of children and animals. Many oils can be harmful if ingested or improperly used.
Signs Your Essential Oil May Have Degraded
Watch for: A noticeably changed aroma, thickened consistency, cloudiness (unless naturally expected), skin irritation from previously tolerated oils
If in doubt, it is safer not to use the oil therapeutically.
Best Practice Storage Checklist
· Store in dark glass bottles
· Keep below 25°C where possible
· Avoid direct sunlight
· Seal tightly after every use
· Keep away from moisture
· Label clearly with dates
· Store safely away from children and pets
Correct storage is one of the simplest yet most important aspects of essential oil care. By protecting your oils from light, heat, air and moisture, you help preserve their therapeutic qualities, extend shelf life and maintain safe use.
Quality essential oils are an investment in wellbeing—storing them properly ensures you get the very best from every drop.
