Skip to content

Emulsifier

STEARETH-21

CAS 9005-00-9 (Generic)
72

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A common ethoxylated stearyl alcohol used as a mild cream emulsifier. Considered safe; PEG part should be properly purified to keep 1,4-dioxane low.

Skin benefits

  • Smooth cream texture
  • Mild emulsifier
  • Stable formulations

Known concerns

  • Possible trace 1,4-dioxane
  • Mild irritation at high %

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

Related emulsifiers

72
ARGAN OIL PEG-8 ESTERS
Emulsifier
 72
BEHENETH-30
Emulsifier
 72
BIS-ISOBUTYL PEG-13/DIMETHICONE COPOLYMER
Emulsifier
 72
BIS-PEG-4 DIMETHICONE
Emulsifier
 72
BIS-PEG/PPG-16/16 PEG/PPG-16/16 DIMETHICONE
Emulsifier
 72
C12-15 ALKETH-3
Emulsifier
 72
CARAPA GUIANENSIS OIL POLYGLYCERYL-6 ESTERS
Emulsifier
 72
CETEARETH-20
Emulsifier

Check your shelf

Find STEARETH-21 in your products.

Scan any cosmetic product with LuxSense to see if it contains STEARETH-21 and get a full ingredient breakdown with safety scores.

This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.