Algin ●
TL;DR. This ingredient is primarily a water-phase thickener, stabilizer, and film-forming polymer. It helps build gel texture, suspend particles, and improve product spread in masks, gels, creams, and hair products.
What does Algin do in a cosmetic formula?
This ingredient is primarily a water-phase thickener, stabilizer, and film-forming polymer. It helps build gel texture, suspend particles, and improve product spread in masks, gels, creams, and hair products.
Is Algin clean?
From a clean beauty perspective, this ingredient is generally well tolerated, not a common fragrance allergen, and has little restricted-list friction. Quality depends on purification, since marine-derived materials can require screening for mineral and heavy-metal residues.
Is Algin sustainable?
This material is typically sourced from brown seaweed, a renewable marine biomass. It is readily biodegradable, though responsible harvesting and traceability matter for ecosystem impact and raw-material consistency.
Is Algin COSMOS-approved?
This ingredient is permitted under COSMOS natural and organic frameworks when it meets source and processing requirements. It aligns well with Green Chemistry principles because it comes from renewable biomass, is biodegradable, and is commonly processed with relatively simple aqueous extraction and purification steps.
How does Algin work chemically?
The molecule is a linear anionic polysaccharide rich in carboxylate groups, which allows it to hydrate in water, increase viscosity, and form gels in the presence of multivalent cations such as calcium. It is commonly used around 0.1% to 2% depending on viscosity target, with performance influenced by electrolyte level, hydration method, and pH, especially under more acidic conditions where solubility can decrease.
Last updated 2026-05-13