Sodium Isostearoyl Lactylate
What is Sodium Isostearoyl Lactylate?
Sodium Isostearoyl Lactylate is the sodium salt of isostearoyl lactylic acid, synthesized by esterifying lactic acid—a natural alpha-hydroxy acid—with isostearic acid, a branched-chain fatty acid derived from vegetable oils, then neutralizing with sodium hydroxide. Primarily used in rinse-off hair care products like shampoos and conditioners, it functions as an anionic surfactant and emulsifier. By reducing surface tension at interfaces, it enables the formation of micelles for gentle cleansing and foam generation, while stabilizing oil-in-water emulsions for creamy textures. Its amphiphilic structure allows it to deposit conditioning films on hair shafts, improving manageability. In some leave-on skin products such as lotions, it contributes to phase stability at low levels, supporting uniform application without greasiness. This ingredient's mild profile makes it suitable for frequent-use formulations focused on hair health.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Enhances hair conditioning for smoother, more manageable strands.
Supports hair strengthening to improve resilience.
Facilitates gentle cleansing and emulsification in rinse-off products.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| People with dry or brittle hair needing conditioning support. | Those with rare allergies to lactylate esters. |
| Individuals seeking mild surfactants in daily shampoos. | People sensitive to anionic surfactants. |
| Users preferring non-comedogenic options for scalp care. | Individuals avoiding synthetic emulsifiers. |
Safety Notes
- Considered low hazard with excellent safety profile in cosmetics.
- Non-comedogenic and suitable for broad use in hair formulations.
Frequently Asked Questions about Sodium Isostearoyl Lactylate
What does Sodium Isostearoyl Lactylate do in products?
It acts as a surfactant for cleansing and foaming, and an emulsifier for stable textures in hair care.
Is it safe for everyday use?
Yes, it has a low safety rating and is gentle for frequent hair washing.
Does it clog pores?
No, it carries a zero comedogenic rating, safe for scalp and skin.