Sodium Alginate ●
TL;DR. This ingredient is used as a water-binding thickener, gel former, stabilizer, and film-forming texture agent in gels, masks, lotions, and cleansers.
What does Sodium Alginate do in a cosmetic formula?
This ingredient is used as a water-binding thickener, gel former, stabilizer, and film-forming texture agent in gels, masks, lotions, and cleansers.
Is Sodium Alginate clean?
It is generally well tolerated, non-sensitizing, and not a common restricted-list concern in clean beauty frameworks. Quality control matters because marine-sourced materials can carry trace minerals or sea-derived impurities depending on sourcing and purification.
Is Sodium Alginate sustainable?
This material is derived from brown seaweed, a renewable marine feedstock, and it is readily biodegradable. The main sustainability variable is responsible seaweed harvesting or cultivation, since poorly managed collection can affect coastal ecosystems.
Is Sodium Alginate COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic standards when sourced and processed according to the standard. It aligns well with Green Chemistry because it comes from a renewable feedstock, functions in water-based systems, and biodegrades readily.
How does Sodium Alginate work chemically?
The molecule is an anionic polysaccharide built from mannuronic and guluronic acid units, which bind water and form gels in the presence of divalent ions such as calcium. Typical use levels are about 0.1% to 2% for viscosity and film formation, and very low pH can protonate the polymer and reduce solubility.
Last updated 2026-05-13