The Brij O range are primary O/W emulsifiers especially suited to emulsifying unsaturated fatty acids. Suitable for the formulation of microemulsion gels as primary emulsifiers or as co-emulsifiers paired with the Crodafos phosphate esters. They are solubilising, dispersing, spreading, wetting and gelling agents. In particular, Brij O10 aids in the production of clear gels. Recommended topical usage levels of 0.5-10%.