A-Leen® 5

A-Leen 5 is a multifunctional non-ionic ingredient that provides robust microbial protection by disrupting cell membrane integrity. Because its mechanism is non-specific, it is unlikely to be affected by common microbial resistance. It is characterized by an exceptionally wide effective pH range  and acts as a superior alternative to traditional glycols and glycerin due to its unique sensory profile.

Key Benefit: A versatile “all-in-one” solution that functions as a standalone preservative, a sensory enhancer, and a high-performance extraction solvent.

Performance & Multifunctional Benefits

  • Preservation Versatility: Met ISO 11930 Criteria A as a standalone preservative in a body cream (pH 5.3) and as a booster alongside Capryloyl Glycine (Caprocine) in O/W emulsions.

  • Superior Sensorials: Consumer studies show it is preferred over propanediol and glycerin for its spreadability, absorbancy, low oiliness, and lack of tackiness.

  • Moisturization: Corneometry studies demonstrate a long-lasting moisturizing effect comparable to 3% Glycerin.

  • Extraction Efficiency: HPLC data shows extraction efficacy and selectivity comparable to ethanol for botanical extracts (e.g., Mentha × piperita)

  • Processing Aid: Functions as a solubilizer for lipophilic ingredients and helps shorten hydration times for gelling agents like xanthan gum.

Formulation & Handling Guidelines

A-Leen 5 is a stable liquid designed for seamless integration into a variety of cosmetic bases.

It can be added directly to the water phase or mixed with vegetable oils; for optimum antimicrobial efficacy in emulsions, it should be added to the aqueous phase or at the post-emulsification stage.

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Primary Function(s)
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INCI Name
Pentylene glycol
CAS Number(s)
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Use Levels
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Free from Annex V or Preservative Free
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Application Type
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Cosmetic Science Criteria

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Green Criteria

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Natural Origin Index (ISO 16128)
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COSMOS Status
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Vegan
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Palm Status
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Palm Free
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Wild Harvested
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Biodegradability
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EWG Score
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Halal
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Upcycled
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Regulatory Status

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