A pH adjuster and base for foaming surfactants in older formulas. It is a moderate irritant on its own, but the real concern is different: combined with nitrosating agents it can form nitrosamines, which are carcinogens. The EU therefore bans DEA in cosmetics.
Topical application
CWeak evidence. In vitro data, open-label studies, or expert consensus.
A functional ingredient, but banned in EU cosmetics over nitrosamine formation risk. Finding it on a label points to an old or unregulated formula. AEMPS does not allow such products on the Spanish market.
Irritation potential
MediumAllergen risk
LowPregnancy
CautionSuitable for
Use with caution
The Evigrade extension adds an evidence panel to Wildberries, Goldapple, Letu, iHerb, Sephora and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Diethanolamine should be used with caution during pregnancy. Consulting a dermatologist or OB-GYN is advisable.
Diethanolamine suits: normal, oily. Use with caution in: sensitive, dry.
Diethanolamine has moderate irritation potential. Sensitive skin may show a transient reaction that usually settles with adaptation.
A pH adjuster and base for foaming surfactants in older formulas.
The INCI name is Diethanolamine. It may also appear as: DEA, Диэтаноламин.
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