C12-16 Pareth-9 ●
TL;DR. This ingredient primarily acts as a nonionic surfactant, solubilizer, and emulsifier, helping oils, fragrance components, and cleansing agents disperse evenly in water-based formulas.
What does C12-16 Pareth-9 do in a cosmetic formula?
This ingredient primarily acts as a nonionic surfactant, solubilizer, and emulsifier, helping oils, fragrance components, and cleansing agents disperse evenly in water-based formulas.
Is C12-16 Pareth-9 clean?
Clean-beauty standards often flag it because it is made through ethoxylation, which can leave trace 1,4-dioxane if purification and testing are not well controlled. Skin tolerance is generally good at typical rinse-off levels, though it can contribute to mild irritation in higher-surfactant or leave-on systems.
Is C12-16 Pareth-9 sustainable?
The oil-loving portion can come from palm, coconut, or petrochemical sources, while the water-loving portion is typically petrochemical. It is generally biodegradable, but sourcing transparency and residue management are the main environmental considerations.
Is C12-16 Pareth-9 COSMOS-approved?
It is not permitted under COSMOS-natural or COSMOS-organic because the ethoxylated portion relies on a process not accepted by those standards. From a Green Chemistry perspective, its biodegradability is a plus, but petrochemical input and possible process residues weaken its alignment.
How does C12-16 Pareth-9 work chemically?
Structurally, the molecule has a C12 to C16 alkyl tail attached to a water-loving chain averaging about 9 ethoxy units, giving it a high HLB suited to oil-in-water emulsification and solubilization. Typical use is about 0.5% to 5% in cleansers, creams, and emulsions, with broad stability across common cosmetic pH ranges and good compatibility with many anionic, amphoteric, and nonionic systems.
Last updated 2026-05-14