Are Essential Oils Flammable? Safety Tips and Guidelines

Are Essential Oils Flammable? Safety Tips and Guidelines

Learn about the flammability of essential oils, factors affecting their flammability, and safety tips for handling and storing these aromatic compounds.


Essential oils are widely used for their therapeutic benefits and aromatic properties. However, their use requires careful consideration of safety, particularly regarding their flammability. This article will explore the flammability of essential oils, factors affecting their flammability, and provide safety tips and guidelines for handling and using them safely.

What are Essential Oils?

Essential oils are concentrated plant extracts obtained through distillation or cold pressing. They capture the plant's natural scent and flavor, or "essence," and are used in aromatherapy, cosmetics, and other applications for their potential health benefits.

Chemical Composition of Essential Oils

Essential oils are composed of various volatile organic compounds (VOCs), including terpenes, alcohols, esters, and phenols. These compounds are responsible for the oils' aromatic and therapeutic properties but also contribute to their flammability.

Flammability of Essential Oils

Essential oils are generally flammable due to their high concentration of VOCs. When exposed to an open flame or high heat, these oils can ignite easily. The flash point, the temperature at which a substance can vaporize to form an ignitable mixture in air, varies among different essential oils but is typically low, making them a fire hazard if not handled properly.

Factors Affecting the Flammability of Essential Oils

Several factors influence the flammability of essential oils:

  • Chemical Composition: Oils with higher terpene content tend to be more flammable.
  • Concentration: Pure essential oils are more flammable than diluted oils.
  • Temperature: Higher temperatures increase the risk of ignition.
  • Ventilation: Poor ventilation can lead to the accumulation of flammable vapors.

Common Essential Oils and Their Flammability

Here are some common essential oils and their relative flammability:

  • Highly Flammable: Eucalyptus, clove, tea tree, peppermint
  • Moderately Flammable: Lavender, rosemary, lemon
  • Less Flammable: Frankincense, sandalwood

Handling Essential Oils Safely

To ensure safety when handling essential oils:

  • Avoid Open Flames: Keep essential oils away from candles, stoves, and other sources of ignition.
  • Use in Well-Ventilated Areas: This prevents the buildup of flammable vapors.
  • Dilute Appropriately: Dilute essential oils with carrier oils to reduce their flammability.
  • Wear Protective Gear: Use gloves and goggles to prevent skin and eye contact.

Storage Recommendations for Essential Oils

Proper storage can mitigate the risk of fire:

  • Store in Cool, Dark Places: Heat and light can degrade essential oils and increase flammability.
  • Use Airtight Containers: This prevents leakage and vapor buildup.
  • Keep Out of Reach of Children and Pets: Prevent accidental spills and exposure.

Using Essential Oils in Candles and Diffusers

When using essential oils in candles and diffusers, follow these guidelines:

  • Use Only a Few Drops: Excessive amounts increase the risk of fire.
  • Monitor Closely: Never leave candles or diffusers unattended.
  • Choose Safe Devices: Use diffusers designed to handle essential oils safely.

Essential Oil Safety in Aromatherapy

In aromatherapy:

  • Dilute Oils: Always dilute essential oils before applying them to the skin.
  • Perform Patch Tests: Check for allergic reactions before extensive use.
  • Avoid Sensitive Areas: Do not apply essential oils near the eyes, nose, or mouth.

First Aid for Essential Oil Fires

In case of a fire:

  • Smother Flames: Use a fire blanket or a damp cloth to smother small fires.
  • Use a Fire Extinguisher: Ensure you have a Class B fire extinguisher, suitable for flammable liquids, on hand.
  • Call Emergency Services: If the fire cannot be controlled, evacuate and call the fire department.

Environmental Concerns and Essential Oil Flammability

The production and disposal of essential oils can impact the environment. It is essential to:

  • Dispose of Oils Properly: Follow local guidelines for disposing of flammable liquids.
  • Use Sustainable Sources: Choose oils from sustainable and eco-friendly sources.

Regulations and Guidelines for Essential Oil Safety

Adhering to regulations and guidelines can enhance safety:

  • Follow Label Instructions: Always read and follow the safety instructions on essential oil labels.
  • Comply with Local Laws: Be aware of local regulations regarding the storage and use of flammable substances.


Q: Are all essential oils equally flammable?

A: No, the flammability varies based on the chemical composition of each oil.

Q: Can essential oils be used in cooking?

A: Only food-grade essential oils should be used in cooking, and in very small amounts.

Q: How should I dispose of essential oils?

A: Follow local hazardous waste disposal guidelines to dispose of essential oils safely.

Q: Can essential oils catch fire in a diffuser?

A: While diffusers are generally safe, always use them as directed and never leave them unattended.

Q: Is it safe to use essential oils around children and pets?

A: Some essential oils can be harmful to children and pets. Always consult with a healthcare provider or veterinarian before use.


Essential oils, while beneficial and versatile, pose a fire risk due to their flammability. By understanding the factors that contribute to their flammability and following safety guidelines, you can enjoy the benefits of essential oils while minimizing the risks. Always handle essential oils with care, store them properly, and adhere to safety regulations to ensure a safe and enjoyable experience.