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Emulsifier

DEA-HYDROLYZED LECITHIN

CAS -
25

Safety score Β· 0–100

Caution

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

Lecithin modified with diethanolamine (DEA). DEA-family ingredients are flagged for potential nitrosamine formation β€” largely deprecated.

DEA-hydrolyzed lecithin is formed by reacting hydrolyzed lecithin with diethanolamine. Secondary amines like DEA can react with nitrosating agents (nitrites, other nitrogen oxides) to form N-nitrosodiethanolamine (NDELA), an IARC Group 2B probable human carcinogen. The EU Cosmetics Regulation Annex III entry 60 restricts DEA-containing formulations and requires NDELA levels below 50 ppb in DEA-containing ingredients. California Proposition 65 lists NDELA. The SCCS has expressed concerns, and major cosmetic brands have phased out DEA derivatives. Lecithin itself is benign β€” the DEA modification is the issue.

Function

HAIR CONDITIONING, SKIN CONDITIONING

Skin benefits

  • Modified lecithin β€” emulsifying and conditioning
  • Derived from soy or egg lecithin

Known concerns

  • Diethanolamine (DEA) derivative β€” nitrosamine formation risk with nitrosating agents
  • DEA family restricted in EU cosmetics (Annex III entry 60 controls)
  • California Prop 65 listed (NDELA)
  • Falling out of favor industry-wide

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.