What it is
Benzyl glycol is the monobenzyl ether of ethylene glycol, a clear liquid that combines mild antimicrobial activity with good solvency for other ingredients. In sunscreens and skincare it is most often paired with other preservatives to broaden and reinforce the preservative system while improving the solubility of poorly soluble actives. It also contributes to the overall sensory and aesthetic profile of a formula.
Safety & warnings
Benzyl glycol is generally well tolerated at the low levels used in cosmetics. Because it is structurally related to benzyl alcohol, individuals sensitive to benzyl alcohol may want to patch test, and benzyl alcohol is itself recognized as a fragrance allergen in some regulatory contexts. Sensitive or reactive skin may occasionally experience mild irritation from glycol ethers.
Origin & sourcing
Benzyl glycol is a synthetic ingredient produced industrially, typically by reacting benzyl alcohol or benzyl chloride with ethylene glycol or ethylene oxide.
Questions everyone asks
What does benzyl glycol do in a sunscreen?
It mainly acts as a solvent and helps support the formula's preservative system, contributing to product stability rather than to sun protection itself.
Is benzyl glycol the same as benzyl alcohol?
No. They are related aromatic compounds but distinct ingredients; benzyl glycol is a glycol ether, while benzyl alcohol is a simpler aromatic alcohol.