Science
Mechanism of Action
Within cosmetic formulations, Methylethanolamine actively reduces surface tension between immiscible liquids, thereby enabling the stable formation of emulsions from diverse components. Its inherent basicity allows it to effectively buffer and regulate pH, ensuring product stability and efficacy.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Methylethanolamine is a strong base; a 10% solution registers a highly alkaline pH of 13.6. For formulation stability and safety, it must avoid strong oxidizing agents, acids, metals (especially copper), acid chlorides, and acid anhydrides. Extreme caution is warranted to prevent the formation of carcinogenic nitrosamines if used alongside nitrosating agents.
Conflicts
- strong oxidizing agents
- acids
- metals
- copper
- acid chlorides
- acid anhydrides
- nitrosating agents
Safety
Safety Profile
The CIR Expert Panel deems Methylethanolamine safe for use strictly in rinse-off cosmetic products, provided formulations are non-irritating. It is critically important to prevent its use in products where N-nitroso compounds may form, as N-Methylethanolamine, a secondary amine, can generate carcinogenic nitrosamines in the presence of nitrites. This ingredient is corrosive and carries a high risk of causing severe skin burns and eye damage. Cosmetic purity specifications generally mandate N-nitroso compound levels not exceeding 50 ppb.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to its high irritancy, corrosive nature, and the significant risk of forming carcinogenic nitrosamines, Methylethanolamine is not recommended for use in precision skincare formulations.
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References
Sources