At a glance
- CAS number
- 91824-88-3
- INCI name
- Polyglyceryl-4 Isostearate
- Function
- emulsifier, emollient, skin-conditioning
- Typical use level
- 1%–10%
- Solubility
- oil
- Stable pH
- 4–8
CAS number and synonyms are sourced from PubChem. Function, usage levels, pH and compatibility are AI-assisted formulation guidance — verify against your supplier's technical data sheet and applicable regulations before use.
Also known as
PG-4 Isostearate Tetraglycerol Isostearate Polyglyceryl-4 Isostearic Acid Ester Isostearic Acid Polyglycerol Ester
Compatibility
Works well with:
Polyglyceryl-2 Diisostearate Cetyl PEG/PPG-10/1 Dimethicone Dimethicone Isostearyl Alcohol Polyglyceryl-6 Polyricinoleate Jojoba Esters
Polyglyceryl-4 Isostearate is well-suited for water-in-oil emulsions and is frequently co-emulsified with other polyglycerol esters such as Polyglyceryl-6 Polyricinoleate to optimize HLB balance. It is broadly compatible with most cosmetic oils, waxes, and silicones. Strong oxidizing agents should be avoided as they may degrade the ester linkage over time.
Formulation notes
Polyglyceryl-4 Isostearate is a mild, non-ionic emulsifier derived from the esterification of polyglycerol with isostearic acid, a branched-chain fatty acid that imparts good skin feel and low crystallization tendency. It is particularly valued in W/O emulsions, color cosmetics, and sun-care formulations for its ability to stabilize emulsions while contributing a smooth, non-greasy skin feel. It is considered biodegradable and well-tolerated by skin, making it a popular choice in natural and eco-conscious formulations.
Frequently asked questions
What is Polyglyceryl-4 Isostearate?
Polyglyceryl-4 Isostearate is a emulsifier, emollient, skin-conditioning used in cosmetic and personal-care formulation. Typical use level is 1%–10%. It is oil-soluble. Stable in the pH 4–8 range.
What is Polyglyceryl-4 Isostearate used for?
Polyglyceryl-4 Isostearate is used as emulsifier, emollient, skin-conditioning in cosmetic and personal-care formulations.
What is the typical use level of Polyglyceryl-4 Isostearate?
Polyglyceryl-4 Isostearate is typically used at 1%–10% in the finished formulation. Always confirm against your supplier's technical data sheet.
What is the CAS number of Polyglyceryl-4 Isostearate?
The CAS registry number for Polyglyceryl-4 Isostearate is 91824-88-3. Its INCI name is Polyglyceryl-4 Isostearate.
At what pH is Polyglyceryl-4 Isostearate stable?
Polyglyceryl-4 Isostearate is generally stable in the pH 4–8 range.
What ingredients are compatible with Polyglyceryl-4 Isostearate?
Polyglyceryl-4 Isostearate works well with Polyglyceryl-2 Diisostearate, Cetyl PEG/PPG-10/1 Dimethicone, Dimethicone, Isostearyl Alcohol, Polyglyceryl-6 Polyricinoleate, Jojoba Esters.
Related ingredients
- Behenyl PEG/PPG-20/20 DimethiconeEmulsifier
- Cetearyl AlcoholEmulsifier
- Glyceryl StearateEmulsifier
- LecithinEmulsifier
- Arachidyl AlcoholEmollient
- Behenyl AlcoholEmollient