PEG-30 Stearate

PEG-30 Stearate is a nonionic surfactant/emulsifier typically used at low percentages (~0.5–5%) to stabilize creams and lotions. Clinical experience and patch-test data for PEG-fatty acid esters suggest they are generally well tolerated, with irritation being uncommon but possible in highly reactive or barrier-compromised eczema skin (often more from formulation context than the ingredient alone). Given its low intrinsic irritancy yet non-zero risk in compromised skin and leave-on products, a conservative “gentle” score is appropriate. Safety Notes: PEG-30 Stearate is used primarily as a nonionic emulsifier/co-emulsifier and solubilizing surfactant in O/W creams, lotions, and some cleansers; in commercial leave-on emulsions it is often present at low supporting levels around 0.1–1% when paired with other emulsifiers. In higher-structure or “self-emulsifying” systems (including some OTC body butters, barrier creams, and creamy rinse-off cleansers), it can be pushed to ~3–8% to stabilize high oil loads and improve texture/foam-creamy feel. It is not generally subject to a specific maximum concentration limit under US/EU cosmetic regulations, so upper use is practically constrained by sensorial impact, irritation potential in sensitive skin, and compatibility with the fatty phase/emulsifier package.