Mia Seilern
PIROCTONE OLAMINE
⚠️ Data is provided for informational purposes only. It may contain inaccuracies and should be independently verified. This is not medical advice. Consult a healthcare professional before making health decisions.

Description: PIROCTONE OLAMINE — antimicrobial agent (mainly anti-dandruff use, also functions as preservative).

All Functions: antimicrobial agent (mainly anti-dandruff use, also functions as preservative)

Quick Facts:

  • Category: preservative
  • Regulatory Note: Restricted in the EU

Proven Benefits At A Glance:

  • Piroctone olamine (also called Octopirox) is an antifungal agent used in dandruff and seborrheic dermatitis treatments
  • It works by reducing problematic fungi and bacteria on the scalp and rebalancing the scalp microbiome
  • Research shows it can reduce dandruff flaking, itching, redness, and greasiness within 4 weeks
  • How well it reaches your scalp depends on the formula and solvents used in the product
  • It’s most stable in formulas using propylene glycol or ethanol-based systems
Safety: CautionResearch confidence: Good

Safety tier is a starting heuristic from regulatory status and comedogenic rating, not a dermatological verdict — see our Terms for the full disclaimer. Research confidence reflects how many real cited studies back this ingredient, not the strength of their findings.

🧪 PIROCTONE OLAMINE

Chemical structure of PIROCTONE OLAMINE

PIROCTONE OLAMINE

CAS Number: 68890-66-4

Also Known As:

Category: preservative

EC Number: 272-574-2

Korean Name: 피록톤올아민

1-Hydroxy-4-methyl-6-(2,4,4-trimethylpentyl)pyridin-2(1H)-one, compound with 2-aminoethanol (1:1)

PIROCTONE OLAMINE is a preservative ingredient used in skincare formulations.

antimicrobial agent (mainly anti-dandruff usealso functions as preservative)

🌍 Regulatory Status

EU: RestrictedUS: No restriction on file

EU max concentration: Maximum secondary amine content: 0.5%

📊 Comedogenicity

No data yet
Not rated for this ingredient yet.

📚 Research & Evidence

PUBMED CITATIONS
5
Data sources: EU CosIng PubMed

🔬 The Science

Piroctone olamine is a salt form of the antifungal compound piroctone, specifically designed for topical use on skin and scalp (Int J Cosmet Sci, 2023). Dandruff and its more severe form, seborrheic dermatitis, are linked to a combination of factors including disruption of the scalp’s protective barrier and overgrowth of microorganisms, particularly the fungus Malassezia (Int J Cosmet Sci, 2024). #1: The ingredient works as an antifungal agent to manage dandruff (Int J Cosmet Sci, 2023). #2: Research using DNA sequencing of scalp microbiomes shows that after 3 weeks of treatment with a 0.5% piroctone olamine shampoo, the ingredient reduces levels of problematic organisms like Malassezia restricta and Staphylococcus capitis while increasing beneficial Cutibacterium acnes, essentially restoring a healthier microbial balance (Int J Cosmet Sci, 2024).

The same study found that these microbiome changes correlated with reduced oxidative stress markers on the scalp (Int J Cosmet Sci, 2024). #3: In a clinical study of 20 patients with moderate to severe scalp seborrheic dermatitis treated with a combination product containing piroctone olamine, dandruff scores dropped significantly from 2.45 to 1.10 by week 4, itching decreased from 2.35 to 1.10, redness went from 1.55 to 1.10, and greasiness fell from 2.60 to 1.40 (J Cosmet Dermatol, 2025). After 16 weeks, 80% of patients showed overall clinical improvement, with severe cases improving to mild status (J Cosmet Dermatol, 2025).

The physicochemical properties of piroctone olamine—how it dissolves and behaves in different liquids—affect how well it penetrates and deposits on skin (Int J Cosmet Sci, 2023). It dissolves best in methanol and propylene glycol but shows poor solubility in some other solvents, and it remains stable in ethanol and propylene glycol systems but degrades in water-based solutions over several days (Int J Cosmet Sci, 2023). #4: How effectively piroctone olamine reaches your scalp depends heavily on the delivery system: in laboratory testing with human skin, no permeation occurred when the ingredient was dissolved in single solvents alone, but permeation increased significantly when combined in two- or three-component solvent systems, with the best results from specific propylene glycol and Transcutol combinations (Int J Cosmet Sci, 2024).

#5: Formulation innovations that optimize how piroctone olamine binds to or releases from shampoo ingredients have been shown to increase its scalp deposition and improve clinical anti-dandruff efficacy as measured by visible flake reduction and underlying biomarkers (Int J Cosmet Sci, 2023). The sources note these are emerging findings and that products vary in their formulation strategies to maximize delivery.

💧 Skin Type Compatibility

No data yet
Per-skin-type data isn’t curated for this ingredient yet.

⚠️ Don’t Combine With

No data yet
No known incompatibilities on file for this ingredient.

🧴 Products Containing PIROCTONE OLAMINE

📄 Related Research

Matched by search — not necessarily verified support for every statement above.

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