At a glance
- CAS number
- 159701-21-0
- INCI name
- Lecithin
- Function
- emulsifier, emollient, active, antioxidant, surfactant
- Typical use level
- 0.1%–3%
- Solubility
- both
- Stable pH
- 3–7
CAS number and synonyms are sourced from PubChem. Function, usage levels, pH and compatibility are AI-assisted formulation guidance — verify against your supplier's technical data sheet and applicable regulations before use.
Also known as
Lecithin (NF) Lecithin [NF] Granulestin Ovovitellin Phospholutein Gliddex Kelecin Lecithine Alcolec S Emulthin M35 ActiFlow 68SB Phospholipid with Choline
Compatibility
Works well with:
Glycerin Hyaluronic Acid Niacinamide Tocopherol Ceramides Fatty Alcohols Glyceryl Stearate Xanthan Gum Panthenol Retinol
Use caution with:
Strong Oxidizing Agents High-Concentration Alcohols Strong Acids Strong Bases
Lecithin is prone to hydrolysis and oxidative degradation at extreme pH levels (below 3 or above 7) and at elevated temperatures, so antioxidants like Tocopherol are recommended co-ingredients. High concentrations of ethanol can disrupt its lamellar structure and reduce emulsification efficacy. It is generally well-tolerated across most cosmetic actives and lipid systems.
Formulation notes
Derived from soy, sunflower, or egg sources; allergen declaration may be required for soy- or egg-derived grades in certain markets. Can exhibit batch-to-batch variability in phosphatidylcholine content. Hydrogenated or lyso forms are more oxidatively stable. Store away from heat and light to prevent rancidity.
Frequently asked questions
What is Lecithin?
Lecithin is a emulsifier, emollient, active, antioxidant, surfactant used in cosmetic and personal-care formulation. Typical use level is 0.1%–3%. It is both-soluble. Stable in the pH 3–7 range.
What is Lecithin used for?
Lecithin is used as emulsifier, emollient, active, antioxidant, surfactant in cosmetic and personal-care formulations.
What is the typical use level of Lecithin?
Lecithin is typically used at 0.1%–3% in the finished formulation. Always confirm against your supplier's technical data sheet.
What is the CAS number of Lecithin?
The CAS registry number for Lecithin is 159701-21-0. Its INCI name is Lecithin.
At what pH is Lecithin stable?
Lecithin is generally stable in the pH 3–7 range.
What ingredients are compatible with Lecithin?
Lecithin works well with Glycerin, Hyaluronic Acid, Niacinamide, Tocopherol, Ceramides, Fatty Alcohols, Glyceryl Stearate, Xanthan Gum, Panthenol, Retinol. Use caution when combining it with Strong Oxidizing Agents, High-Concentration Alcohols, Strong Acids, Strong Bases.
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