What Is Ethanolamines (MEA, DEA, TEA)?
In plain English: Ethanolamines — monoethanolamine (MEA), diethanolamine (DEA) and triethanolamine (TEA) — are a family of ingredients used in cleaners to adjust pH, emulsify and cut grease. Their main concern is that they can help form nitrosamines, a group of carcinogenic contaminants.
Also listed as: MEA, monoethanolamine, DEA, diethanolamine, TEA, triethanolamine
The honest science
Ethanolamines are versatile: MEA turns up in floor cleaners, tile cleaners and laundry detergents to lift grease and stains, while DEA and TEA act as emulsifiers and pH buffers in cleaners and personal care. 1 On their own they're mostly irritation-level concerns for skin, eyes and lungs.
The bigger issue is chemistry after the fact. When ethanolamines share a product with certain preservatives that release nitrogen, they can react to form nitrosamines — a class of compounds that regulators describe as carcinogenic across more animal species than nearly any other. 1 Because these form in the mixture rather than being added directly, they don't appear on the ingredient list.
Regulators split on the details: the European Commission prohibits DEA in cosmetics specifically to limit nitrosamine contamination, while the Cosmetic Ingredient Review has judged ethanolamines safe as currently used. 1 For a household with kids, the practical move is simple — avoiding DEA and TEA in leave-on and heavily-used products removes one of the pathways to nitrosamine formation, without needing to settle the whole scientific debate.
Where you'll find it
- floor and tile cleaners
- laundry detergent
- degreasers
- all-purpose cleaners
- glass cleaners
The safer-swap angle: Ethanolamines are a case where the ingredient plus the wrong companion equals the problem. Simpler formulas built on plant surfactants and mineral pH adjusters don't open that nitrosamine door.
Frequently asked questions
What do MEA, DEA and TEA do in cleaners?
They adjust pH, emulsify oil and water, and help cut grease. MEA is common in floor, tile and laundry products; DEA and TEA more often act as emulsifiers and buffers.
Why are ethanolamines linked to cancer?
Not directly — the concern is that they can react with nitrogen-releasing preservatives in the same product to form nitrosamines, which are considered potent carcinogens. Since nitrosamines form in the mix, they aren't listed on the label.
Are ethanolamines banned?
The EU prohibits DEA in cosmetics to reduce nitrosamine risk, while the U.S. Cosmetic Ingredient Review considers ethanolamines safe as used. Guidance differs, so many label-readers choose to avoid DEA and TEA where they can.
Sources
- Ethanolamine Compounds (MEA, DEA, TEA and Others) — Safe Cosmetics / Breast Cancer Prevention Partners
Ingredient safety data changes as new research is published, and product formulas change over time. Always read the current label and check primary sources.
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