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STEARAMIDOETHYL DIETHANOLAMINE HCL.

Questionable CAS - / ANTISTATIC, HAIR CONDITIONING

STEARAMIDOETHYL DIETHANOLAMINE HCL is a cationic amidoamine derivative functioning primarily as an antistatic and hair conditioning agent. It also possesses emulsifying properties, aiding in the stabilization of oil-in-water formulations.

Summary

Antistatic Hair Conditioning Emulsifying Foam Boosting Viscosity Increasing

Science

Mechanism of Action

This ingredient operates as a cationic agent, particularly when neutralized, imparting antistatic properties. As an amidoamine derivative, it facilitates the blending of oil and water phases, acting as an emulsifier to improve foam characteristics and stabilize product texture within cosmetic formulations.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 7
0 7 14

Stability

To ensure optimal stability and safety, STEARAMIDOETHYL DIETHANOLAMINE HCL must be formulated to prevent irritation and, crucially, to avoid the formation of N-nitroso compounds (nitrosamines). This necessitates strict avoidance of co-formulation with nitrosating agents like nitrites or nitrates. Given its parent compound, Diethanolamine, is hygroscopic and basic, the HCL salt should also be shielded from moisture and carbon dioxide.

Conflicts

  • nitrosating agents (e.g., nitrites, nitrates)

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
40%
Sensitization risk Moderate

The CIR Expert Panel considers Diethanolamine (DEA) and its salts, including related amidoamines, safe for use under specific conditions: formulations must be non-irritating, and the potential for N-nitroso compound formation must be eliminated. For related diethanolamides, concentrations up to 40% are deemed safe in leave-on products, provided free ethanolamine levels do not exceed 5%. However, the SCCS in Europe has prohibited Diethanolamine (DEA) in cosmetics due to concerns regarding carcinogenicity, genotoxicity, skin penetration, and irritation, largely stemming from the risk of forming N-nitrosodiethanolamine (NDELA) in the presence of nitrosating agents. This highlights the critical need for careful formulation and ingredient selection to ensure product safety.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Questionable

While offering emulsifying and conditioning properties, STEARAMIDOETHYL DIETHANOLAMINE HCL is deemed questionable for precision skincare due to significant formulation restrictions necessary to prevent irritation and the formation of potentially harmful N-nitroso compounds, and regulatory scrutiny related to its chemical family in some regions.

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