The material selection platform
Cosmetics Ingredients
The material selection platform
Cosmetics Ingredients


CAS Number 122-19-0
Chem/IUPAC Name: Benzyldimethyl(octadecyl)ammonium chloride
EINECS/ELINCS No: 204-527-9
COSING REF No: 38237
Stearalkonium Chloride is an antistatic ingredient and a surfactant used in hair care products to improve the look and feel of the shafts. It is also a potent antimicrobial agent. This synthetic ingredient appears as a white or light yellow solid in its raw form. Although highly effective, Stearalkonium Chloride has many use restrictions due to its potential to cause severe allergies and other side effects. It is important to follow safety guidelines for its safe usage. The chemical formula of Stearalkonium Chloride is C27H50ClN.


Stearalkonium Chloride is widely used in the cosmetic industry for its conditioning, anti-static and emulsifying properties. As a conditioning agent, it helps to detangle hair, reduce static, and improve manageability, leaving hair feeling soft and smooth. Additionally, Stearalkonium Chloride serves as an effective emulsifier, aiding in the formulation of stable creams, lotions, and other cosmetic products. This ingredient is commonly found in products like conditioners, hair masks, and styling products.


Stearalkonium Chloride is synthesized through the quaternization of stearic acid with dimethylaminopropylamine. This reaction forms Stearalkonium Chloride, a quaternary ammonium compound. The process involves mixing stearic acid and dimethylaminopropylamine under controlled conditions, followed by neutralization with hydrochloric acid to produce the final product.

What does STEARALKONIUM CHLORIDE do in a formulation?

  • Antistatic
  • Cleansing
  • Emulsifying
  • Foaming
  • Preservative
  • Smoothing
  • Soothing
  • Surfactant

Safety profile

Stearalkonium Chloride can prove to be a toxic ingredient if used in concentrations higher than 5%. There have been reported cases of skin and eye irritation due to this ingredient. Patch testing before use is mandatory, especially in the case of sensitive skin.

Technical profile

Property Values
Boiling Point 120°C
Melting Point 54-56°C
pH 4-6
Solubility Soluble in water
Viscosity Low
Back to Top