Camphor oil is made by dissolving solid camphor into a carrier oil using gentle heat. The process takes about 15 to 20 minutes at home and requires only camphor tablets (or powder), a carrier oil, and a simple double-boiler setup. True camphor essential oil, by contrast, is steam-distilled from the wood and leaves of the camphor tree, a process that requires industrial equipment and trees at least 15 years old.
Most people searching for how to make camphor oil want the home infusion method, so that’s where we’ll start.
The Home Infusion Method
This technique dissolves store-bought camphor into a carrier oil, producing a camphor-infused oil suitable for topical use. Camphor is highly soluble in organic solvents and oils but practically insoluble in water, so oil is the right medium.
Here’s what you need:
- Camphor: 1 teaspoon of camphor powder or a crushed camphor tablet
- Carrier oil: 4 tablespoons of coconut, olive, or sesame oil
- A double boiler: a heat-safe bowl set over a pot of water
Bring water to a boil in the lower pot, then remove it from heat. Place your carrier oil in the upper bowl and stir in the camphor powder. The residual heat will melt the camphor into the oil without scorching it. Stir until the camphor fully dissolves and the mixture looks uniform. Let it cool completely before transferring it to a dark glass bottle.
If you’re using camphor blocks or tablets rather than powder, crush them into fine pieces first. Smaller particles dissolve faster and more evenly. A mortar and pestle works, or you can place the tablet in a zip-lock bag and press it with a rolling pin. Camphor sublimes at room temperature, meaning it slowly turns from solid directly into vapor, so work quickly once you’ve crushed it.
Choosing the Right Carrier Oil
Olive oil and sesame oil are the most commonly recommended carriers for camphor infusions. Both dissolve camphor effectively and have long shelf lives on their own. Coconut oil is another popular choice, especially for skin applications, though it solidifies below about 76°F (24°C), which can make the finished product thick in cooler weather.
Mustard oil is traditional in some South Asian preparations, particularly for joint and muscle rubs. It has a warming quality of its own that complements camphor’s cooling-then-warming sensation on skin. Choose whichever carrier oil suits your intended use, but avoid mineral oil if you plan to use the blend on your face or sensitive skin.
Getting the Concentration Right
Concentration matters more than any other variable in this process. The FDA limits camphor in over-the-counter topical pain relievers to a maximum of 11%, and most products sold as analgesics contain between 3% and 11%. For general home use, staying below 11% is the standard safety guideline.
The ratio above (1 teaspoon camphor to 4 tablespoons carrier oil) produces a concentration in the range of roughly 3% to 5%, depending on how firmly you pack the teaspoon. That falls comfortably within the range used in commercial chest rubs and muscle balms. If you want a milder version for lighter applications, cut the camphor in half.
A separate common ratio uses 1 teaspoon of camphor oil blended into 100 mL of olive or sesame oil. This produces a more dilute solution better suited for broader skin application or massage.
How Commercial Camphor Oil Is Made
The camphor oil sold in small brown bottles at health stores is produced very differently from the home method. Commercial extraction uses steam distillation: leaves or wood chips from the camphor laurel tree (Cinnamomum camphora) are heated with water vapor for about 6 hours. The steam carries volatile oil compounds out of the plant material, and the oil is separated from the water after cooling.
Steam distillation captures only the oil-soluble compounds and loses water-soluble ones, which limits the yield. A newer industrial method, supercritical CO₂ extraction, operates at lower temperatures (around 45°C) and higher pressures, preserving heat-sensitive compounds that steam distillation destroys. This method achieves yields around 4.6% from leaf material.
The camphor tree itself must be at least 15 years old before it produces enough oil to be worth harvesting. Leaf oil from these trees is about 93% camphor by composition, with small amounts of other plant compounds. The wood contains a more complex mix: roughly 53% camphor alongside other aromatic compounds that give it antibacterial and antifungal properties. This is why you can’t replicate true camphor essential oil at home. You’re starting with refined camphor and adding it to oil, which gives you a useful product but not the full chemical profile of the distilled version.
Storage and Shelf Life
Camphor sublimes at room temperature. Left in an open container, your infused oil will gradually lose potency as the camphor evaporates into the air. Store the finished oil in a dark glass bottle (amber or cobalt blue) with a tight-fitting cap. Keep it in a cool, dry place away from direct sunlight and heat sources.
Tighten the cap immediately after each use. The longer the bottle stays open, the more camphor vapor escapes and the more oxygen gets in, which degrades both the camphor and the carrier oil over time. A well-stored camphor oil infusion should remain effective for several months. If the oil starts to smell rancid or loses its characteristic sharp camphor scent, it’s time to make a fresh batch.
Safety Precautions
Camphor is toxic when swallowed. As little as 3 to 5 mL of a 20% camphor oil solution can be a lethal dose, and children are especially vulnerable. A case report describes a three-and-a-half-year-old girl who experienced seizures after ingesting camphor. Symptoms of camphor poisoning appear rapidly, sometimes within five minutes, and include nausea, vomiting, confusion, and convulsions.
Store homemade camphor oil where children and pets cannot reach it. Never use it near the mouth, nose, or eyes of infants. Do not apply it to broken skin, and never take it internally. If you’re making camphor oil for muscle rubs or chest balms, the concentration guidelines above (under 11%) exist specifically to prevent skin irritation and accidental toxicity from absorption.
Before applying camphor oil to a large area of skin, test a small amount on your inner forearm and wait 24 hours. Redness, itching, or a burning sensation that doesn’t fade within a few minutes means you should dilute the mixture further or choose a different remedy.