Polyglyceryl-3 Diisostearate

Polyglyceryl-3 diisostearate is a nonionic emulsifier/surfactant used typically at low percentages (about 0.5–5%) to stabilize oil-water systems, and it is generally well tolerated because it is not a strong degreasing cleanser surfactant. Human irritation and patch-test experience with polyglyceryl esters overall shows low irritancy and low sensitization potential, though any emulsifier can rarely sting or irritate severely compromised eczema skin when barrier function is markedly impaired. Given broad tolerability in sensitive-skin formulations but acknowledging occasional reactivity in highly compromised skin, I score it as very gentle rather than exceptionally gentle. Safety Notes: Polyglyceryl-3 Diisostearate is most commonly used as a W/O emulsifier and pigment/dispersing aid, and in many leave-on creams, lotions, and makeup products it appears at low support levels around ~0.1–1% (sometimes slightly higher) to improve stability and sensorials. In consumer-available anhydrous/balm-type products (cleansing balms, makeup removers, balm cleansers) and high-slip makeup systems, it can function as a primary structuring/emulsifying lipid and is observed at much higher levels, commonly 5–15% and up to ~35% in specialized OTC balms/cleansers and heavy makeup bases. No specific FDA/EU maximum concentration applies beyond general safety requirements; practical limits are driven by phase behavior, viscosity, and sensory constraints, with higher levels more typical in rinse-off/cleansing and anhydrous formats than in standard leave-on emulsions.

Suitability