Dipropylene Glycol
Blue 2Blue 1Dipropylene GlycolDPG
Preservative
Blue 2 is a chemical used to prevent the growth of bacteria and mold in cosmetics and personal care products. It's also used to give some products a blue color.
Moderate Concern
Source: EWG Skin Deep
Some studies have linked Blue 2 to skin irritation and allergic reactions, but the FDA has approved it for use in cosmetics.
No result found for this ingredient.
r/okbuddycinephile
18572
Blue is the warmest color 2
Preparing for the next pandemic: Efficacy of 2 commercial glycol vapor and aerosol products against aerosolized surrogate viruses and microbes on surfaces.
Cadnum JL, Torres-Teran MM, Memic S
2026
Read on PubMedRelated Ingredients
Last updated: May 16, 2026