Science
Mechanism of Action
Piroctone Olamine primarily functions by inhibiting the growth of Malassezia species (e.g., Malassezia globosa and Malassezia restricta) through disruption of their cell membrane composition and enzyme activity, thereby interfering with vital fungal processes and energy metabolism. It also chelates essential metal ions, particularly iron, which are critical for fungal enzyme function. Beyond its antifungal action, it possesses antibacterial properties, reduces inflammation to alleviate itching, flaking, and redness, aids in restoring scalp barrier function, and can gently exfoliate the cuticle to lessen dandruff formation.
Research
Clinical Evidence
High confidence0.5%
Key findings
- 01 Shampoo containing 0.5% Piroctone Olamine reduced dandruff by 81.7% over 6 weeks, demonstrating superior efficacy compared to 0.5% Zinc Pyrithione (68.6% reduction).
- 02 Shampoo with 0.75% Piroctone Olamine exhibited superior short-term and long-term anti-dandruff effects when compared to 1.0% Climbazole.
- 03 Piroctone Olamine shampoo led to statistically significant increases in hair amount, decreased oxidative stress on the hair and scalp, and improved overall scalp condition and hair retention.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Piroctone Olamine is stable within a pH range of 3.0 to 9.0 and shows good thermal stability, remaining stable even when briefly heated above 80°C. However, it is sensitive to UV light and necessitates protection from direct ultraviolet radiation, requiring storage in opaque or colored packaging. It is freely soluble in 10% ethanol in water, soluble in aqueous surfactant solutions (1%-10%), and slightly soluble in water (0.05%) and oil (0.05%-0.1%). Its solubility in water slightly increases in neutral or weakly basic solutions. It can also enhance the viscosity of some surfactant systems.
Conflicts
- Metal ions (e.g., iron, copper) which can form undesirable colored complexes.
- Aldehyde and keto groups in specific fragrances, potentially leading to color problems.
Safety
Safety Profile
Piroctone Olamine is generally considered safe, demonstrating low toxicity and low irritation potential. It is listed in Annex V/35 of the European Cosmetic Directive EC 1223/2009, with maximum concentrations of 1.0% for rinse-off products and 0.5% for other (leave-on) cosmetic applications. The FDA has initiated a call-for-data for Piroctone Olamine (0.05%-0.5% for leave-on and 0.1%-1.0% for rinse-off) for consideration in its OTC drug monograph system for dandruff control. Studies indicate it is non-sensitizing, non-genotoxic, and non-teratogenic. Skin irritation tests in rabbits showed it was non-irritant at concentrations up to 3.0%, though it was rated as a slight eye irritant in rabbits at 2.0-3.0% concentrations.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Piroctone Olamine is a highly valuable ingredient for targeted scalp and skin treatments, offering proven efficacy against fungal-related issues and inflammation with a favorable safety profile.
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