Calcium Stearate
AKA “Calcium octadecanoate, Octadecanoic acid, calcium salt, Calcium distearate, Calstar, Flexichem, Aquacal, Flexichem CS”
Synthetic
Ingredient Facts
Calcium stearate
AKA: Calcium octadecanoate, Octadecanoic acid, Calcium salt, Calcium distearate, Calstar, Flexichem, Aquacal, Flexichem CS
Synthetic · Anticaking · EWG: 5
Synthetic
Colorant
Emulsifier
Synthetic
Clean
A natural mineral-derived ingredient that helps create a smooth, even texture and prevents clumping in powders and formulas.
Solubility 0.004 G/100 CC H2O AT 15 °C; INSOL IN ALCOHOL & ETHER
Formula
C36H70CaO4
Mol. Weight
607.00
CAS #
1592-23-0
Form
Liquid
State
Pellets or Large Crystals, Liquid, Other Solid; Pellets or Large Crystals; Pellets or Large Crystals, Liquid; Dry Powder, Pellets or Large Crystals; Water or Solvent Wet Solid; Dry Powder; Liquid; Dry
See origin →
Functions
Anticaking
Colorant
Gives the product its color. Purely aesthetic — makes the formula look good in the jar but does nothing for your skin.
Emulsifier
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Thickener
Prevents Clumping
Adds Color
Stabilizes Emulsion
Controls Viscosity
Keeps Formula Blended
Skin Types
●all-skin-types
Take the Skin ID quiz to see if this matches your skinMelanin-Rich Skin
Suitable
EWG
5
CIR
—
Pregnancy
—
CIR Safety Findings
Not a Sensitizer
all-shades-safe
Regulatory Agencies
Final Report of the Safety Assessment of Lithium Stearate, Aluminum Distearate, Aluminum Stearate, Aluminum Tristearate, Ammonium Stearate, Calcium Stearate, Magnesium Stearate, Potassium Stearate, So
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Calcium Stearate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Feb 2026
Data: PubChem · CosIng · EWG