PEG-50 Hydrogenated Castor Oil Isostearate

PEG / Ethoxylated

What is PEG-50 Hydrogenated Castor Oil Isostearate?

PEG-50 Hydrogenated Castor Oil Isostearate is a synthetic ingredient derived from castor oil, which undergoes hydrogenation, esterification with isostearic acid, and ethoxylation with 50 units of polyethylene glycol. This process creates a non-ionic surfactant commonly used in rinse-off and leave-on cosmetics like cleansers, shampoos, lotions, and makeup removers. It functions by reducing surface tension to facilitate dirt removal and foam formation, stabilizing emulsions by forming protective films around oil droplets in water, and modifying viscosity for smoother application and even distribution. In formulations, it supports clear micellar solutions and creamy textures, enhancing overall product performance without leaving residue.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 3 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Emulsifying agent
Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Supports effective cleansing by lowering surface tension for better dirt and oil removal.

Stabilizes oil-in-water mixtures, leading to consistent lotion and cleanser textures.

Adjusts thickness for improved spreadability and user-friendly dispensing.

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 gentle foaming cleansers or shampoos.
Those with sensitivity to ethoxylated compounds.
Users of emulsion-based moisturizers wanting stable consistency.
Individuals preferring PEG-free formulations.
People preferring smooth-textured makeup removers or serums.
People concerned about potential impurities in processed surfactants.

Safety Notes

  • Rated moderate concern by EWG due to possible contamination risks from manufacturing.
  • Deemed safe for cosmetic use by regulatory reviews when properly purified.

Frequently Asked Questions about PEG-50 Hydrogenated Castor Oil Isostearate

What does PEG-50 Hydrogenated Castor Oil Isostearate do in products?

It cleanses by reducing surface tension, emulsifies oil and water, and controls thickness for better texture.

Is it safe for daily use?

Evaluated as low to moderate hazard by databases, suitable in cosmetics with purification standards.

Does it irritate skin?

Generally mild as a non-ionic surfactant, with low comedogenic potential.