Octanediol ●
TL;DR. This ingredient is a multifunctional humectant, solvent, and preservative-support agent. It helps reduce water loss from skin feel while boosting antimicrobial systems in water-based formulas.
What does Octanediol do in a cosmetic formula?
This ingredient is a multifunctional humectant, solvent, and preservative-support agent. It helps reduce water loss from skin feel while boosting antimicrobial systems in water-based formulas.
Is Octanediol clean?
It is generally well tolerated and has a low sensitization profile, with possible mild eye or skin irritation at higher use levels. Clean-beauty frameworks usually treat it as acceptable when purity is controlled and it is not positioned as a stand-alone preservative.
Is Octanediol sustainable?
This material can be made from petrochemical feedstocks or from plant-derived fatty acid sources such as coconut or palm. It is expected to be biodegradable, with sustainability depending mainly on feedstock traceability and responsible sourcing.
Is Octanediol COSMOS-approved?
It can be permitted under COSMOS-natural when made through allowed processes from compliant feedstocks, but petrochemical versions do not align as well. From a Green Chemistry view, renewable sourcing and biodegradability are the strongest positives, while hydrogenation or reduction steps add processing intensity.
How does Octanediol work chemically?
The molecule is an eight-carbon chain with two alcohol groups, giving it both water compatibility and enough lipophilicity to interact with microbial membranes and skin lipids. Typical use is often around 0.3% to 1.0%, and it is broadly stable across normal cosmetic pH ranges while pairing well with organic acids, glycols, and phenoxy-based preservation systems.
Last updated 2026-05-13