Stearamidoethyl Diethylamine

What is Stearamidoethyl Diethylamine?

Stearamidoethyl diethylamine is a synthetic cationic surfactant derived from stearic acid, a common fatty acid, combined with diethylamine. It belongs to the class of amidoamines, which are mild conditioning compounds used primarily in hair care formulations like shampoos, conditioners, and detanglers. In products, it functions by becoming positively charged in slightly acidic environments, allowing it to adhere to the negatively charged hair surface. This adsorption neutralizes static electricity, reduces friction between hair strands, and deposits a protective film that promotes detangling and overall manageability. Its amphoteric nature contributes to gentle cleansing without stripping natural oils, making it suitable for rinse-off applications where residue is minimal.

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:

Antistatic agent
Reduces static electricity and flyaways by improving surface conductivity, enhancing hair manageability and smoothness in conditioners and styling products.
Hair conditioning
Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.

Benefits

Minimizes static buildup for reduced flyaways and easier styling.

Boosts hair softness and combability by lowering surface friction.

Supports shine and smoothness without weighing hair down.

Who It's For

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

Who May Benefit Who Should Avoid
Individuals with frizzy or static-prone hair from dry environments.
Those with known sensitivity to amine-based compounds.
Users seeking better detangling in daily hair care routines.
Users preferring completely natural or silicone-free formulas.
People with normal to dry hair types needing mild conditioning.
Individuals experiencing scalp irritation from cationic surfactants.

Safety Notes

  • Rated low hazard by environmental health assessments.
  • Deemed safe for use in rinse-off hair products by cosmetic safety reviews.

Frequently Asked Questions about Stearamidoethyl Diethylamine

What is stearamidoethyl diethylamine used for?

Primarily as an antistatic and conditioning agent in hair products to improve smoothness and reduce static.

Is it safe for daily use?

Yes, safety reviews confirm it's suitable in rinse-off products at typical levels.

Does it clog pores?

Rated non-comedogenic, making it unlikely to contribute to breakouts.