Polyglyceryl-4 Caprate: Simple Micellar Water Formulation, HLB, and Sensitive Skin Suitability

That's a great choice for a gentle cleanser!

1. Simple Formulation: Yes, mixing Polyglyceryl-4 Caprate with water and glycerin is an excellent and common way to create a simple, effective cleansing water or micellar water. The Polyglyceryl-4 Caprate acts as the cleansing agent/solubilizer, water is the solvent, and glycerin is a humectant to prevent dryness. We recommend a starting usage rate of around 5% for the Polyglyceryl-4 Caprate, as suggested in the product description.
2. HLB and Sensitivity: You are correct that Polyglyceryl-4 Caprate is a high HLB surfactant, typically estimated to be in the range of 13-15. However, you should not be concerned about it being too harsh for sensitive skin. This ingredient is specifically chosen and marketed as a gentle, PEG-free alternative to traditional cleansing agents (like PEG-6 Caprylic/Capric Glycerides). Its mildness is why it is a key ingredient in many commercial micellar waters and cleansing products designed for sensitive skin, as noted in the product description examples.