Propylene Glycol
What is Propylene Glycol?
Propylene Glycol is a synthetic organic compound derived from petroleum, commonly used in skincare as a humectant, solvent, and penetration enhancer. It helps retain moisture in the skin by drawing water from deeper layers and the environment, while also improving the texture and spreadability of formulations. The '6' in the query likely refers to a specific concentration or grade (e.g., Propylene Glycol USP grade), but it is not a standard INCI designation.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Humectant
Attracts and holds water in the stratum corneum, boosting hydration and plumpness; commonly used in moisturizers, cleansers, and hair conditioners.
Solvent
Dissolves and carries other ingredients, helping control viscosity, evaporation rate, and delivery of actives in both water- and oil-based systems.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.