What it is
Propylene glycol dicaprylate is a clear, low-viscosity ester made from propylene glycol and caprylic (C8) fatty acid. In sunscreens and other formulas it functions as an emollient that gives slip and a light, non-greasy skin feel, and it can also help dissolve and disperse oil-soluble UV filters and other lipophilic ingredients. Its low viscosity makes it useful in fluid and easy-to-spread products such as sticks and lotions.
Safety & warnings
Propylene glycol dicaprylate is generally well tolerated and is considered low risk for irritation at cosmetic use levels. It is a lightweight ester with a low comedogenic tendency, making it a relatively skin-friendly emollient. It is not a known fragrance allergen.
Origin & sourcing
Synthetic, produced by esterifying propylene glycol with caprylic acid; the fatty acid is commonly derived from plant oils such as coconut or palm.
Questions everyone asks
What does propylene glycol dicaprylate do in sunscreen?
It works as a light emollient that adds slip and helps dissolve oil-soluble UV filters, giving the product a smooth, non-greasy feel.
Is propylene glycol dicaprylate heavy on skin?
No, it is a low-viscosity ester that tends to feel light and is often chosen for easy spreadability in fluid and stick formats.