Science
Mechanism of Action
This ingredient functions as an antiseptic and a natural preservative booster by exhibiting potent antimicrobial effects against fungi, viruses, and bacteria, while also inhibiting biofilm formation. On the skin, it demonstrates anti-inflammatory action, which is notably amplified when co-formulated with chitosan, providing an enhanced soothing effect. Emerging research also suggests potential benefits for wound healing and anti-aging applications.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Demonstrates antifungal, anti-viral, antibiotic, and anti-biofilm properties, with potential for managing conditions like chronic dermatophytosis.
- 02 Exhibits anti-inflammatory action, effectively soothing irritated or sensitive skin, especially when combined with chitosan.
- 03 Shows promise in supporting wound healing through its antimicrobial properties, though scientific studies on humans are limited.
- 04 Indicates potential for contributing to anti-aging benefits.
Transparency
Dusting Analysis
No data suggests D-Dihydrogeraniol is commonly 'dusted' (used in negligible amounts to claim significant benefits).
The Formula
Formulation
Stability
D-Dihydrogeraniol is chemically stable under recommended storage conditions: cool, dry, well-ventilated, and tightly sealed containers. It is soluble in ethanol, most non-volatile oils, and propylene glycol. Water solubility is slight, ranging from approximately 105.5 mg/L to 0.85 g/L at 25 °C, and it is insoluble in glycerol. A mildly acidic pH, such as 5.1, has been cited for the stability of citronella oil nanoemulsions containing Citronellol.
Synergies
- Chitosan (enhances anti-inflammatory action)
Conflicts
- Oxidizing agents
Safety
Safety Profile
D-Dihydrogeraniol (Citronellol) is identified as a potential skin sensitizer and allergen, with mandatory patch tests recommended for individuals with known sensitivities. The Scientific Committee on Consumer Safety (SCCS) in Europe classifies Citronellol as a regulated fragrance allergen, leading to restrictions to minimize consumer fragrance allergy. The Research Institute for Fragrance Materials (RIFM) indicates a No Expected Sensitization Induction Level (NESIL) of 29,000 µg/cm² for skin sensitization. While the FDA has recognized derivatives from Citrus flowers/leaves (from which it's derived) as Generally Recognized As Safe (GRAS) for food flavoring, its dermal application carries a substantial risk for sensitization, particularly at higher concentrations where it can be toxic. IFRA provides a specific restriction limit of 13.00% for its use as a fragrance ingredient in leave-on face/body products (Category 3).
Your Skin
Skin Compatibility
Our Assessment
Verdict
Despite possessing promising antimicrobial and anti-inflammatory attributes, D-Dihydrogeraniol's classification as a regulated fragrance allergen and its medium irritancy potential pose significant concerns for precision skincare, particularly for sensitive or reactive skin types.
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