Ethanolamines: DEA, TEA, and MEA
What It Is
Ethanolamines are a family of organic compounds that carry both an amine group and one or more alcohol (hydroxyl) groups on the same molecule. The three parent members are distinguished by how many ethanol groups attach to the central nitrogen: monoethanolamine (MEA, one group), diethanolamine (DEA, two groups), and triethanolamine (TEA, three groups). Two fatty-acid derivatives — cocamide DEA and cocamide MEA — are made by reacting coconut-derived fatty acids with DEA or MEA. Each compound has its own dedicated page; this hub covers what the family shares and why the members are usually discussed together.
Common Uses
Ethanolamines are workhorse functional ingredients in household and personal care products. MEA and TEA are used as pH adjusters and buffering agents that keep a formula in its target alkaline range, which helps surfactants lift grease. TEA also acts as an emulsifier, holding oil and water phases together in creams and sprays. DEA historically thickened and boosted foam. The cocamides — cocamide DEA and cocamide MEA — serve as foam stabilizers and viscosity builders in dish soaps, hand soaps, shampoos, and bubble baths. On labels they appear in all-purpose cleaners, degreasers, glass cleaners, and liquid detergents.
How It Works
The amine group is what gives ethanolamines their utility. Because the nitrogen accepts protons, MEA and TEA neutralize acidic components and hold a formulation at a stable, mildly alkaline pH; that alkalinity improves the performance of anionic surfactants against oily soils. The same amine chemistry lets these molecules behave as weak surfactants and emulsifiers, lowering surface tension at oil-water boundaries. The cocamide derivatives work differently: their amide structure reinforces the walls of foam bubbles produced by primary surfactants, slowing bubble collapse to create the dense, persistent lather many consumers associate with cleaning power.
Safety and Regulation
The defining concern for this family is nitrosamine formation. Secondary amines — DEA most notably, and DEA-derived cocamide DEA — can react with nitrosating agents present as impurities or preservatives to form N-nitrosamines, a class of compounds of established concern. The International Agency for Research on Cancer evaluated diethanolamine and classified it as Group 2B, "possibly carcinogenic to humans" (IARC Monographs, vol. 101, 2013). Cocamide DEA was added to California's Proposition 65 list of carcinogens effective June 22, 2012 (OEHHA). The Cosmetic Ingredient Review Expert Panel has assessed the ethanolamines as safe for use with concentration limits, and specifically advises that they should not be used in products where they can form nitrosamines. Triethanolamine has been reviewed by IARC and placed in Group 3 (not classifiable as to carcinogenicity). The individual pages carry the full detail for each compound.
Why Natural Flower Power Does Not Use It
Natural Flower Power does not use any ethanolamine — no MEA, DEA, or TEA, and no cocamide DEA or cocamide MEA — in any product.
We adjust and buffer pH with other means and build our foam from plant-derived surfactants rather than ethanolamine-based boosters. Where a foam booster is called for, we use cocamide DIPA (cocamide diisopropanolamine), which does not share the same nitrosamine formation pathway or the Proposition 65 listing that cocamide DEA carries. Avoiding the ethanolamine family entirely removes the nitrosamine question from our formulations rather than managing it with limits.
Related Ingredients
This family page anchors the individual ethanolamine ingredient entries. Diethanolamine (DEA) is the secondary amine at the center of the nitrosamine concern. Triethanolamine (TEA) is the emulsifier and pH adjuster of the group. Monoethanolamine (MEA) is the simplest member, used mainly for pH and buffering. Cocamide DEA is the coconut-derived foam booster on California's Proposition 65 list, and Cocamide MEA is its MEA-based sibling. Natural Flower Power uses none of these.
Sources
- International Agency for Research on Cancer (IARC). "Diethanolamine." IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, vol. 101, 2013.
- California Office of Environmental Health Hazard Assessment (OEHHA). "Cocamide Diethanolamine Listed Effective June 22, 2012." Proposition 65 Carcinogens List.
- Cosmetic Ingredient Review (CIR) Expert Panel. "Safety Assessment of Ethanolamine and Ethanolamine Salts as Used in Cosmetics."
