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Moumoujus

N-LAURYL DIETHANOLAMINE.

Avoid CAS 1541-67-9 / HAIR CONDITIONING

N-Lauryl Diethanolamine is a non-ionic surfactant and emulsifier, structurally designed to stabilize oil-water systems and enhance product cleansing and foaming. Classified as a diethanolamine (DEA) derivative, its use presents notable safety concerns due to high irritancy potential and risk of forming carcinogenic N-nitroso compounds.

Summary

Hair conditioning Emulsifying Dispersant Solubilizer Surfactant Foam booster Viscosity increasing agent

Science

Mechanism of Action

As a non-ionic surfactant and emulsifier, N-Lauryl Diethanolamine facilitates the stable combination of immiscible phases through its amphiphilic structure, featuring a hydrophilic diethanolamine head and a hydrophobic lauryl tail. This structure also contributes to its capacity to disrupt cellular membranes, alongside providing dispersing, solubilizing, and foam-boosting effects, and exhibiting antibacterial properties.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH 7 – 8
0 7 14

Stability

Optimal stability and solubility are observed within a pH range of 7.0 to 8.0. The ingredient has a reported calculated pKa of 8.7.

Conflicts

  • Nitrosating agents (due to potential formation of carcinogenic N-nitroso compounds)

Safety

Safety Profile

CIR Status
Safe with restrictions
Sensitization risk High

The Cosmetic Ingredient Review (CIR) Expert Panel considers this DEA derivative safe when formulated to be non-irritating and when N-nitroso compound formation is precluded. This aligns with its restricted status under the EC Cosmetics Regulation. However, safety data sheets indicate a high risk profile, including potential allergic skin reactions (H317), severe skin burns and eye damage (H314), and general skin (H315) and serious eye irritation (H319).

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy High
Comedogenicity Unknown

Our Assessment

Verdict

Avoid

Despite its functional utility as a surfactant and emulsifier, the significant safety concerns, including high irritancy and the potential for carcinogenic N-nitroso compound formation, strongly suggest its avoidance for precision skincare applications.

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