Diethanolamide

Diethanolamides are common ingredients used in cosmetics to act as a foaming agents or as emulsifiers.[1] Chemically, they are amides formed from diethanolamine and carboxylic acids, typically fatty acids.

Chemical structure of the diethanolamide lauramide diethanolamine

Examples include:

Cocamide diethanolamine
Lauramide diethanolamine
Oleamide diethanolamine

References

Kritchevsky, J.; Sanders, H. L. (1954). "Foam stabilization by alkylolamides: effect of molecular weight". Primer congrès mondial de la détergence et des produits tensio-actifs. 1. Paris. pp. 133–136.

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[1] Kritchevsky, J.; Sanders, H. L. (1954). "Foam stabilization by alkylolamides: effect of molecular weight". Primer congrès mondial de la détergence et des produits tensio-actifs. 1. Paris. pp. 133–136.