Castor Oil Propanediol Esters ●
TL;DR. This ingredient is a nonionic solubilizer and emollient ester, used to help disperse small oil-phase materials such as fragrance in water-based formulas while adding a light, conditioned feel.
What does Castor Oil Propanediol Esters do in a cosmetic formula?
This ingredient is a nonionic solubilizer and emollient ester, used to help disperse small oil-phase materials such as fragrance in water-based formulas while adding a light, conditioned feel.
Is Castor Oil Propanediol Esters clean?
It is generally well aligned with clean-beauty standards because it is PEG-free, ethoxylate-free, and typically low in irritation. Clean-standard review usually focuses on residual processing aids, free fatty acids, free diol, and the allergen profile of materials it helps solubilize rather than on the molecule itself.
Is Castor Oil Propanediol Esters sustainable?
This material is commonly made from renewable plant-oil fatty acids and a diol that can be bio-based. Its ester bonds support biodegradation, with the main sustainability variables coming from agricultural sourcing, processing energy, and supply-chain traceability.
Is Castor Oil Propanediol Esters COSMOS-approved?
It can be permitted in COSMOS-natural and COSMOS-organic formulations when the feedstocks and processing aids meet the standard’s natural-origin and manufacturing criteria. From a Green Chemistry perspective, it fits well because it uses renewable inputs, ester chemistry, and no ethoxylation.
How does Castor Oil Propanediol Esters work chemically?
The material is a mixture of it built from hydroxylated C18 fatty chains and a three-carbon diol, giving it both lipophilic character and enough polarity to assist solubilization. It is typically used at low single-digit percentages, with higher use possible for fragrance solubilization, and like most it is most stable in mildly acidic to neutral systems rather than strongly acidic or alkaline conditions.
Last updated 2026-05-13