Calcium Stearate

What is Calcium Stearate?

Calcium stearate is the calcium salt of stearic acid, a long-chain saturated fatty acid derived from natural sources such as animal fats or vegetable oils like palm or coconut. Chemically, it appears as a fine white powder insoluble in water, making it ideal for incorporation into solid and semi-solid cosmetic formulations. Commonly found in makeup powders, pressed powders, eyeshadows, foundations, lotions, and creams, it functions by adsorbing excess moisture to prevent particle aggregation, thereby enhancing product flow and uniformity. In emulsions, it reinforces the interface between oil and water phases, reducing separation risks. As a viscosity modifier, it influences flow properties for smoother application and better spreadability, contributing to overall product stability and sensory appeal without altering skin feel significantly.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Anticaking agent
Prevents powders from clumping by reducing moisture pickup and improving flow, keeping loose and pressed powders uniform during storage and use.
Colorant
Provides or corrects color using dyes or pigments, helping achieve a consistent shade and visual appearance across batches and throughout wear.
Emulsion stabilizer
Improves emulsion robustness by preventing droplet coalescence and phase separation, often by thickening, structuring, or strengthening the interfacial layer.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Enhances powder flow and prevents clumping for even application in makeup.

Supports emulsion integrity to maintain product consistency over time.

Regulates thickness for improved texture and usability in various formulas.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Users of loose or pressed powders seeking uniform texture.
Those with rare sensitivities to stearic acid derivatives.
Individuals with emulsion-based products like lotions for lasting stability.
People allergic to calcium-based compounds.
People preferring non-comedogenic ingredients in daily cosmetics.
Individuals preferring mineral-free formulations.

Safety Notes

  • Rated low hazard by safety assessments, suitable for broad use.
  • Non-comedogenic with minimal irritation potential in cosmetics.

Frequently Asked Questions about Calcium Stearate

What is calcium stearate derived from?

It is the calcium salt of stearic acid from vegetable or animal fats.

Is calcium stearate safe for sensitive skin?

It has low irritation potential and is suitable for most skin types.

Does it affect product texture?

Yes, it controls viscosity for better spreadability and stability.