Stearamidopropyl Dimethylamine

Basic Info:

  • Chemical Synonym(s): Octadecanamide,N-(2-(dimethylamino)-1-methylethyl)-; N-(2-(Dimethylamino)-1-methylethyl)octadecanamide;
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  • CAS Number: 20182-63-2
  • Chemical Formula:

    C 23 H 48 N 2 O

  • MSDS: Download


Boiling point
490.6±28.0 °C(Predicted)
0.874±0.06 g/cm3(Predicted)
Molecular Weight
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Stearamidopropyl Dimethylamine is a liquid and odorless amphoteric surfactant derived from vegetable-based fatty acids. It has moderate to strong foaming, conditioning and rheology control properties for liquid or viscous formulations.

It's usually added to lotions, shampoos, or hair dyes for its conditioning benefits. The key benefit is its ability to strengthen hair fibers at the molecular level, boosting their elasticity and leaving them resistant to damage. 

 Studies show it helps to maintain moisture, reduce sebum production and control bacterial growth on the skin.

This component is often found within both face and body washes and surfactant-based shampoos and conditioners because its versatility reduces irritation for those with sensitive skin or scalp conditions such as psoriasis or dandruff.


Stearamidopropyl Dimethylamine can be used in cosmetics, topical medications, ointments and toothpaste. It is used, for example, to increase the viscosity of shampoos and cleaners or as an emulsifier in soaps, detergents and creams.

It can also be found in personal care products such as cosmetics and lotions, perfumes and colognes.

In personal care products, it is used as a gentle cleanser for dry to ultra-sensitive skin types, provides sheerness and luster to hair care solutions and acts as a clear make-up remover that leaves no sticky residue.

It can be added as a secondary surfactant or as a co-surfactant. In some but not all cases, it helps thicken formulas with pearlescence or lotion texture properties.

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