D-Limonene

D-limonene is most commonly obtained through cold-pressing or steam distillation of citrus rinds (orange, lemon, lime).

• Chemical Formula:  C ₁₀ H ₁₆

• Scent: Strong, bright citrus aroma.

• Solubility: It is non-polar, meaning it doesn’t mix with water but is an excellent solvent for oils and greases.

Benefits and Effects

In the world of aromatherapy and wellness, D-limonene is often studied for its potential physiological effects:

• Anti-Inflammatory: Some studies suggest it may help reduce markers of inflammation.

• Anxiolytic: Inhalation is frequently associated with stress relief and mood elevation.

• Absorption Enhancer: In topical applications, it can help the skin better absorb other medicinal compounds.

Safety and Handling

While D-limonene is generally recognized as safe (GRAS) by the FDA for food consumption, there are a few "pro-tips" for handling it in its concentrated form:

• Skin Irritation: In high concentrations, it can cause dermatitis. Always dilute it if applying to the skin.

• Oxidation: When exposed to air over time, it oxidizes. Oxidized D-limonene is a much more potent skin allergen than the fresh version.

• Plastic Degradation: Because it’s such a strong solvent, it can actually dissolve or "cloud" certain types of plastics (like polystyrene). If you're mixing a citrus-heavy cleaner, glass or high-density polyethylene (HDPE) containers are your best bet.