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CALCIUM STEAROYL LACTYLATE.

Valuable CAS 5793-94-2 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A versatile oil-soluble emulsifier and humectant derived from stearic acid and lactic acid, widely utilized for its ability to stabilize rich textures. It acts as a multi-functional conditioning agent that creates a protective moisture seal on the skin's surface without a greasy residue.

emulsifying surfactant skin conditioning humectant

Science

As an anionic surfactant and water-in-oil emulsifier, it works by integrating with the skin's natural lipid barrier to minimize trans-epidermal water loss (TEWL). It facilitates a smooth application experience by preventing the 'soaping' effect in emulsions while simultaneously attracting and holding moisture within the stratum corneum.


Research

High confidence
Effective range 2.5–7%
Optimal

3%

Key findings

  1. 01 Clinical evaluation at 3.0% indicates significant enhancement in hydration and sensory performance in both anhydrous and emulsion-based systems.
  2. 02 Safety testing at 7.0% demonstrated zero irritation across multiple cohorts, though certain 2.5% hair-care formulations suggested potential for irritation, highlighting the importance of proper stabilization.

Transparency

Not commonly dusted
Min. effective
1%
Red flag below
0.5%

Typically utilized at functional levels between 2% and 5% to achieve emulsification; levels below 1% in heavy creams may indicate it is being used for label claims rather than structural integrity.


The Formula

Solubility
Oil
Optimal pH ≥5
0 7 14

Stability

Supplied as a cream-colored powder; must be incorporated into the oil phase. Avoid acidic environments to prevent hydrolysis.

Synergies

  • Natural oils
  • Glycerin
  • Non-ionic emulsifiers

Conflicts

  • Strongly cationic ingredients
  • Formulations with pH below 5.0

Safety

CIR Status
Safe as used
Max tested
7%
Pregnancy
Safe
Sensitization risk Low

Recognized by the FDA as a safe food additive (E482). It is non-sensitizing when formulated correctly within the recommended pH and concentration parameters.


Your Skin

Yes Normal
Yes Dry
No Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Valuable

An excellent dual-purpose ingredient that provides structural stability to formulations while delivering tangible hydration and barrier support.


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