Oleyl Betaine

Benefits
Hair ConditioningCleansingAntistaticSoftening

What is Oleyl Betaine?

Oleyl Betaine is an amphoteric surfactant, chemically a zwitterionic betaine derived from oleyl alcohol—a long-chain fatty alcohol sourced from plant oils like olive or sunflower—and trimethylglycine structure. Produced via quaternization of oleyl dimethylamine with chloroacetic acid, it features a C18 alkyl chain for mildness. Primarily used in rinse-off hair care products like shampoos and conditioners, as well as body washes and facial cleansers. It functions by lowering surface tension to create stable micelles that lift dirt and sebum without harsh stripping, while its positive-negative charge balance ensures pH adaptability and low eye/skin irritation. Additionally, it boosts foam quality, enhances viscosity for better texture, neutralizes static via conductivity improvement, and deposits a softening film on hair shafts and skin for smoother feel and manageability.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Antistatic agent
Reduces static electricity and flyaways by improving surface conductivity, enhancing hair manageability and smoothness in conditioners and styling products.
Hair conditioning
Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Cleansing agent
Removes dirt, oil, and impurities by lowering surface tension and forming micelles, enabling soils to be lifted and rinsed away from skin, hair, or teeth.
Foam booster
Enhances foam volume and creaminess and can stabilize lather, improving sensory feel and perceived cleansing in shampoos and wash-off products.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Provides gentle cleansing by forming micelles to remove impurities effectively.

Conditions hair and skin, improving softness, shine, and ease of styling.

Acts as antistatic and foam booster for better product performance and sensory experience.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals seeking mild, non-stripping cleansers for daily hair and body wash.
Those with rare allergies to betaine surfactants or oleyl derivatives.
People with flyaway-prone or dry hair needing conditioning and static reduction.
People experiencing contact dermatitis from long-chain alkyl compounds.
Users preferring sulfate-free formulations with good lather and texture.
Individuals sensitive to amphoteric surfactants in high concentrations.

Safety Notes

  • Considered low hazard with minimal irritation potential in cosmetic use concentrations.
  • Rated safe for rinse-off products by cosmetic safety review panels.

Frequently Asked Questions about Oleyl Betaine

What is Oleyl Betaine used for?

Primarily as a mild surfactant in shampoos, conditioners, and body washes for cleansing, foaming, and conditioning.

Is Oleyl Betaine irritating?

It has low irritation potential, suitable for sensitive skin and eyes in rinse-off products.

Does it help with hair static?

Yes, it reduces static electricity by improving surface conductivity for smoother, more manageable hair.