At a glance
- CAS number
- 61788-85-0
- INCI name
- PEG-40 Hydrogenated Castor Oil
- Function
- emulsifier, solubilizer, surfactant
- Typical use level
- 0.5%–10%
- Solubility
- water
- Stable pH
- 4–9
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
Cremophor RH 40 Kolliphor RH 40 Etocas 40 Hydrogenated Castor Oil PEG-40 Ether Polyoxyl 40 Hydrogenated Castor Oil
Compatibility
Works well with:
Fragrance oils Essential oils Silicones Polysorbate 80 Glycerin Vitamin E
Use caution with:
High concentrations of electrolytes Strong acids Strong bases
PEG-40 Hydrogenated Castor Oil is highly effective at solubilizing oils, fragrances, and lipophilic actives into aqueous systems; it can be combined with other nonionic surfactants like Polysorbate 80 for enhanced solubilization. High electrolyte concentrations can cause cloud point depression and phase separation. Avoid extreme pH conditions, which can lead to ester hydrolysis and reduced performance.
Formulation notes
PEG-40 Hydrogenated Castor Oil is a nonionic, water-soluble emulsifier and solubilizer derived from the ethoxylation of hydrogenated castor oil with approximately 40 moles of ethylene oxide. It is widely used to incorporate oils, fragrances, and essential oils into clear aqueous formulations such as toners, micellar waters, and shampoos without causing haze. Formulators should be aware that PEG-derived ingredients may contain trace levels of 1,4-dioxane as a byproduct of ethoxylation; reputable suppliers typically provide material with acceptably low residual levels.
Frequently asked questions
What is PEG-40 Hydrogenated Castor Oil?
PEG-40 Hydrogenated Castor Oil is a emulsifier, solubilizer, surfactant used in cosmetic and personal-care formulation. Typical use level is 0.5%–10%. It is water-soluble. Stable in the pH 4–9 range.
What is PEG-40 Hydrogenated Castor Oil used for?
PEG-40 Hydrogenated Castor Oil is used as emulsifier, solubilizer, surfactant in cosmetic and personal-care formulations.
What is the typical use level of PEG-40 Hydrogenated Castor Oil?
PEG-40 Hydrogenated Castor Oil is typically used at 0.5%–10% in the finished formulation. Always confirm against your supplier's technical data sheet.
What is the CAS number of PEG-40 Hydrogenated Castor Oil?
The CAS registry number for PEG-40 Hydrogenated Castor Oil is 61788-85-0. Its INCI name is PEG-40 Hydrogenated Castor Oil.
At what pH is PEG-40 Hydrogenated Castor Oil stable?
PEG-40 Hydrogenated Castor Oil is generally stable in the pH 4–9 range.
What ingredients are compatible with PEG-40 Hydrogenated Castor Oil?
PEG-40 Hydrogenated Castor Oil works well with Fragrance oils, Essential oils, Silicones, Polysorbate 80, Glycerin, Vitamin E. Use caution when combining it with High concentrations of electrolytes, Strong acids, Strong bases.
Related ingredients
- Ceteareth-20Emulsifier
- Cetearyl GlucosideEmulsifier
- PEG-100 StearateEmulsifier
- Polysorbate 20Emulsifier
- Behenyl PEG/PPG-20/20 DimethiconeEmulsifier
- Cetyl PhosphateEmulsifier