Researched by Helena DeMaria-Williams
Formula IngredientEmulsifierPolyglyceryl-4 Isostearate
INCI: Polyglyceryl-4 Isostearate
Polyglyceryl-4 isostearate is a PEG-free emulsifier formed by the esterification of tetraglycerol (a polymer of four glycerol units) with isostearic acid. It is a lipophilic (oil-loving) emulsifier commonly used to stabilise water-in-oil (W/O) emulsions. It is frequently combined with other polyglycerol esters (such as polyglyceryl-3 diisostearate) in sunscreens, foundations, and other makeup products to create stable, elegant formulations.
Category
Emulsifier
Irritation Risk
Low
Skin Types
all skin types, sensitive, oily, dry, combination
What does this do in a formula?
emulsification, W/O emulsion stabilisation, texture enhancement, ingredient compatibility
Is Polyglyceryl-4 Isostearate safe? Key considerations
Can Polyglyceryl-4 Isostearate cause irritation?
Low RiskPolyglyceryl-4 isostearate is well tolerated at cosmetic concentrations. Polyglycerol esters are considered mild and gentle. No EU CosIng Annex II or III restrictions apply.
Does Polyglyceryl-4 Isostearate increase sun sensitivity?
No RiskPolyglyceryl-4 isostearate does not increase photosensitivity. No sun protection precautions are required.
Is Polyglyceryl-4 Isostearate safe during pregnancy?
SafePolyglyceryl-4 isostearate is an inert emulsifier with no systemic absorption from topical use. No reproductive or developmental concerns are documented.
How does Polyglyceryl-4 Isostearate work?
Polyglyceryl-4 isostearate is a PEG-free emulsifier formed by the esterification of tetraglycerol (a polymer of four glycerol units) with isostearic acid. It is a lipophilic (oil-loving) emulsifier commonly used to stabilise water-in-oil (W/O) emulsions. It is frequently combined with other polyglycerol esters (such as polyglyceryl-3 diisostearate) in sunscreens, foundations, and other makeup products to create stable, elegant formulations.
Which products contain Polyglyceryl-4 Isostearate?
Shop products that contain Polyglyceryl-4 Isostearate
