Regulatory Status
For full compliance data across 55 jurisdictions, use the Substance Compliance tool.
Safety Data
Calculate MoS for your specific formulation with the MoS Calculator.
Expert Verdict
CIR concluded "safe in present practices of use and concentration." No significant irritation, sensitization, or toxicity documented. Plant-derived and generally well-tolerated. Magnesium salt of alginic acid (seaweed-derived polysaccharide); plant/synthetic origin; forms gels in the presence of divalent cations; excellent film-forming and thickening properties
Regulatory Flags
Frequently Asked Questions
Is Magnesium Alginate safe in cosmetics?
CIR concluded "safe in present practices of use and concentration." No significant irritation, sensitization, or toxicity documented. Plant-derived and generally well-tolerated. Magnesium salt of alginic acid (seaweed-derived polysaccharide); plant/synthetic origin; forms gels in the presence of divalent cations; excellent film-forming and thickening properties The EU classifies Magnesium Alginate as "permitted". Safety rating: MODERATE.
Is Magnesium Alginate allowed in the EU?
Magnesium Alginate EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Magnesium Alginate do in cosmetics?
Magnesium Alginate functions as: Binding, emulsion stabilizing, viscosity controlling. It is classified as a cosmetic ingredient in our database. CAS number: 37251-44-8.
What is the Margin of Safety for Magnesium Alginate?
not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.
Compliance Tools
Check Magnesium Alginate compliance across multiple jurisdictions:
Related Ingredients
Is Magnesium Alginate in Your Products?
Scan any product label with Piro — our free ingredient scanner. Point your camera at the ingredients list and get instant safety scores for every ingredient.
Try Piro Free →Analyze Your Full Ingredient List
Paste any INCI list into the Decoder for instant safety analysis, or calculate the Margin of Safety for Magnesium Alginate in your formulation.