Science
Mechanism of Action
As a polypropylene glycol, PPG-13 primarily acts as a humectant by attracting water to the skin's surface, which helps to increase hydration, minimize flaking, and restore suppleness. Its solvent properties contribute to formulation stability, and it may also serve as a penetration enhancer, optimizing the delivery of other active ingredients into the skin.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polypropylene glycols are generally stable under typical cosmetic conditions. They are non-volatile and non-corrosive, though they can react with oxygen at temperatures of 120 °C or higher. No specific pH range for optimal stability is noted.
Conflicts
- strong oxidizing agents
Safety
Safety Profile
The CIR Expert Panel concluded that a broad group of 131 alkyl PEG/PPG ethers, including PPG-13, are safe for use in cosmetics when formulated to be non-irritating. While a specific maximum concentration for PPG-13 is not provided, related compounds like propylene glycol are FDA-approved as Generally Recognized As Safe (GRAS) at concentrations up to 98% in topical drugs. PPG-13 (as Polypropylene Glycol) is listed by the FDA as a substance added to food. No specific SCCS opinion was found for PPG-13.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PPG-13 is a valuable multi-functional ingredient in formulations due to its solvent properties, skin-conditioning benefits, and potential to enhance the efficacy of other actives through improved penetration.
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