Isostearyl Lactate is an oil-soluble, liquid ester. It is a clear yellow liquid that is especially lubricious and silky to the touch. It is miscible with natural and mineral oils and volatile silicones, dispersible with propylene glycol, and insoluble in water and ethanol.
As an alpha-hydroxy acid derivative, Isostearyl Lactate lends moisturization and softness to the skin, enriching and enhancing formulations designed for body application, resulting in a pleasant after-feel. It provides moisturization through a semi-occlusive barrier effect.
In addition, the skin’s natural esterases break down Isostearyl Lactate, producing lactic acid (AHA) and ensuring its slow release. These are enzymes found in the epidermis that can hydrolyze esters, and in the case of Lactate esters, release lactic acid, allowing it to perform its exfoliating effect.
In its unhydrolyzed form, Isostearyl Lactate functions as an emollient and humectant, decreasing the rate of transepidermal water loss through occlusion. It also attracts water from the atmosphere and deeper hydrates the epidermis layers thanks to the hydrogen bonding ability of its free hydroxyl group.Isostearyl Lactate can also serve as a replacement for sesame oil. It is a safe and versatile ingredient that is non-irritating to the skin and eyes.
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