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CITRUS AURANTIUM DULCIS PEEL OIL EXPRESSED.

Avoid CAS 8028-48-6 / PERFUMING

Orange Peel Oil Expressed is a natural extract valued for its antioxidant properties, which can help protect the skin from environmental stressors and combat signs of aging. However, its high potential for irritation and sensitization, largely due to its limonene content, necessitates extremely precise and limited usage in skincare formulations.

Summary

Fragrance Antioxidant Antibacterial Anti-inflammatory Moisturizing Pore Refining Skin Texture Improvement Anti-aging

Science

Mechanism of Action

This oil functions primarily as an antioxidant, rich in compounds including Vitamin C and up to 96% limonene, which actively neutralize free radicals to protect the skin from oxidative stress and environmental damage. This action contributes to reducing premature aging by minimizing the appearance of fine lines and wrinkles. Furthermore, it exhibits antibacterial and anti-inflammatory attributes and may aid in skin moisturization, pore refinement, and overall texture improvement.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Commonly dusted
Min. effective
0.0015% (15 ppm) 5-methoxypsoralen in leave-on products; 2% in rinse-off cleansing preparations%
Red flag below
Any concentration exceeding 0.0015% 5-MOP in leave-on products, or over 2% in rinse-off products.%

Despite perceived natural benefits, Orange Peel Oil Expressed is frequently 'dusted' into formulations without adequate consideration of its safety profile. For leave-on products, exceeding 0.0015% (15 ppm) of 5-methoxypsoralen (5-MOP), a furanocoumarin, presents a significant phototoxicity risk upon UV exposure. Additionally, its high limonene content, prone to oxidation, increases the risk of sensitization and irritation, making any high concentration a red flag for skin safety.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

As a hydrophobic essential oil, it dissolves well in fixed and mineral oils but exhibits limited solubility in propylene glycol and glycerin. Its high limonene content is susceptible to oxidation when exposed to air, which can heighten its sensitizing potential. For optimal shelf-life, storage in a cool environment is crucial.

Conflicts

  • High concentrations in general cosmetic formulations, particularly for leave-on products.
  • Formulations that result in skin exposure to UV light if furanocoumarins (e.g., 5-MOP) are present, due to phototoxicity risk.
  • Concomitant use with other known sensitizing or irritating ingredients, risking additive adverse effects.
  • Formulations that do not rigorously restrict 5-methoxypsoralen (5-MOP) levels to below 0.0015% (15 ppm) for leave-on products.

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
0.0015%
Sensitization risk High

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that citrus-derived peel oils are safe provided that the 5-methoxypsoralen (5-MOP) content does not exceed 0.0015% (15 ppm) in leave-on products, and the formulation is non-sensitizing and non-irritating. For rinse-off cleansing preparations, a maximum concentration of 2% of the oil is recommended to mitigate irritation or sensitization. Its high limonene concentration is a recognized fragrance allergen, and its oxidative degradation products are known sensitizers. Phototoxicity can occur if furanocoumarins are present and subsequently exposed to UV light.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy High
Comedogenicity Medium

Our Assessment

Verdict

Avoid

Despite its antioxidant and potential skin-improving properties, the high irritancy, medium comedogenicity, and stringent safety restrictions, particularly concerning sensitization and phototoxicity risks, render Citrus Aurantium Dulcis Peel Oil Expressed unsuitable for precision skincare formulations.

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