The ingredient, explained
Algin
Algin has published research relevant to cosmetic safety assessment.
Ingredient guide
What it is and what it does
Alginic acid, sodium salt
About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗
- Binding
- Helps the components of a product hold together.
- Masking
- Reduces or conceals the formula's underlying odour or taste.
- Viscosity controlling
- Adjusts how thick or fluid a product is.
Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗
Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.
A closer look
What the research shows
Safety assessment
The final assessment reviews available toxicological and irritation evidence for the named polysaccharide gums in cosmetic use.
What this does not tell us
Grouped safety report includes read-across and derivative/formulation studies, not isolated algin skin efficacy.
Sources for this summary. Published source ↗
Research review checked Oct 1, 2026
Selective exact-identity review of 11 supplied local candidates and the targeted primary-source search recorded below. Bounded review, not a systematic search.
Ingredient research is not proof that a product containing this ingredient works.
Read the 1 selected study
Safety assessment
Safety Assessment of Polysaccharide Gums as Used in Cosmetics ↗
· 2015
Follow the formula
Products containing this ingredient
From the wider catalogue. Linked by the ingredient list, without an efficacy ranking.
Names and identifiers
Registry identity
Alginic acid, sodium salt
- INCI name on ingredient lists
- ALGIN
- CAS registry number
- 9005-38-3, 57606-04-9
Other recorded names (2)
- natrii alginas
- sodium alginate
Sources for this ingredient record
- EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗ · ODbL 1.0 (Open Beauty Facts database) · Recorded Aug 8, 2026