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solvent · humectant

Dipropylene Glycol

Generally safe·Strong evidence

A light, low-odor glycol used as a solvent and humectant, extremely common in Korean toners and essences. It has a low reported irritation rate and is graded low concern in published assessments.

Questions

Is dipropylene glycol toxic?
Dipropylene glycol is classified as safe in cosmetics by regulatory bodies and doesn't carry safety flags in published reviews. It's a humectant that helps products absorb moisture from the air.
Is dipropylene glycol the same as propylene glycol?
No, they're related but different chemicals. Dipropylene glycol has two propylene glycol units linked together, and both are approved in cosmetics. They serve similar functions as humectants.

Products with Dipropylene Glycol

References

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.