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SODIUM ALGINATE SULFATE.

Valuable CAS 9010-06-4 / HUMECTANT

Sodium Alginate Sulfate is a water-soluble polysaccharide derivative, primarily functioning as an advanced humectant and film-former in precision skincare formulations. It creates a flexible, hydrated gel matrix on the skin's surface, enhancing moisture retention and contributing to a smoother, more comfortable feel. This ingredient also supports the skin's natural barrier function and offers soothing properties.

Summary

Humectant Viscosity Controlling Skin Barrier Support Calming / Anti-inflammatory Firming / Elasticity Enhancing Active Ingredient Delivery Aid Detoxifying

Science

Mechanism of Action

This sulfated alginate derivative acts fundamentally as a humectant, efficiently drawing and retaining water within cosmetic preparations and on the skin. Its polymeric structure forms hydrated polysaccharide networks that trap water molecules, creating a flexible gel matrix on the stratum corneum. This barrier not only locks in essential moisture but also delivers a smooth sensory feel and can facilitate the targeted delivery of other active ingredients. Additionally, alginates are recognized for their ability to calm irritated skin, reduce inflammation, and support the integrity of the skin's protective barrier, while also contributing to skin firmness and elasticity by reinforcing collagen structures.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

Specific 'dusting' data for Sodium Alginate Sulfate is not available in the current research, typically referring to ingredient concentration levels that may cause adverse reactions.

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 9
0 7 14

Stability

Sodium Alginate Sulfate solutions exhibit optimal stability within a pH range of 5 to 9, with viscosity remaining largely consistent. It demonstrates insolubility in alcohols, chloroform, ether, and strong acids below pH 3. The ingredient is susceptible to degradation under harsh conditions, including elevated temperatures, concentrated acids, strong bases, and powerful reducing agents. For optimal preservation, the dry powder form should be stored in cool, dry, and well-ventilated conditions, away from incompatible substances.

Conflicts

  • strong acids (leads to degradation and insolubility below pH 3)
  • strong bases (leads to degradation)
  • strong oxidizing agents
  • divalent cations like calcium ions (can induce gelling if not intended)
  • high temperature (leads to degradation)

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Moderate

Sodium Alginate Sulfate is generally considered safe for topical cosmetic application, with toxicity data indicating a practically nontoxic profile (oral-rat LD50 of 18100 mg/kg; oral-mouse LD50 of 17500 mg/kg). While this specific sulfated form has not been reviewed by the CIR Expert Panel, its unsulfated counterpart, Sodium Alginate, has been deemed safe for use. It is crucial to note that 'Sodium Sulfate' (a distinct ingredient) was found safe up to 1% in leave-on formulations. The FDA currently lists 'Alginate, Sodium' for various food applications and is reviewing its use as a stabilizer and thickener in plant protein products up to 3%.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Medium
Comedogenicity Medium

Our Assessment

Verdict

Valuable

Sodium Alginate Sulfate is a valuable ingredient for comprehensive skin hydration and barrier support, offering multi-functional benefits in diverse skincare formulations.

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