How should I store this lavender essential oil and what is its typical shelf life?

Essential oils are sensitive to light, heat, and oxygen. The 5 ml bottle from Botanika is likely dark glass, which helps block UV light. Keep it in the original bottle with the cap tightly closed after each use. Store in a cool, dark place — a drawer, cabinet, or dedicated aromatherapy box away from radiators, windowsills, and humid bathrooms. Temperature fluctuations accelerate oxidation, so avoid leaving it in a car or near appliances that generate heat.

Lavender oil (Lavandula angustifolia) typically retains good quality for 3–5 years when stored correctly, but its composition gradually changes as volatile compounds evaporate and others oxidize. Signs of oxidation include a sharper, less floral aroma, a thicker viscosity, or a change in color toward yellow-brown. Oxidized oil is more likely to cause skin sensitization, so if you notice these changes, it’s best to replace the bottle rather than risk irritation.

To extend usable life, consider transferring a small working amount to a separate dropper bottle for daily use, leaving the main bottle sealed most of the time. Always use clean droppers or pipettes; introducing water or contaminants can promote microbial growth. If the oil develops an off smell, cloudiness, or particulate matter, discard it. The product is not intended to diagnose, treat, or prevent any disease; it is a cosmetic aromatic ingredient for external, diluted use only.