PEG-40 Hydrogenated Castor Oil

PEG / Ethoxylated
Benefits
CleansingSoothing
Concerns
Malassezia Feeding

What is PEG-40 Hydrogenated Castor Oil?

PEG-40 Hydrogenated Castor Oil originates from castor beans (Ricinus communis seed oil), which undergoes hydrogenation to saturate its fatty acids, followed by ethoxylation with 40 ethylene oxide units, creating a water-soluble, non-ionic polyether compound. Commonly found in cleansers, shampoos, lotions, and fragranced waters, it functions primarily as a surfactant to reduce surface tension for better spreading and rinsing, an emulsifier to blend oils into water-based formulas for stable textures, and a solubilizer to dissolve lipophilic fragrances and oils into clear aqueous solutions. This enables transparent toners, micellar waters, and sprays while supporting foam generation in washes. Its hydrophilic nature enhances product clarity and mildness compared to harsher surfactants.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1-3 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Fragrance ingredient
Contributes scent character and/or masks base odors, shaping the overall sensory experience of the formula (subject to allergen and IFRA considerations).
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.
Solubilizing agent
Helps incorporate oils and fragrance into water-based formulas by forming micro-solutions, enabling clear sprays, toners, and micellar products.

Benefits

Supports effective cleansing by lowering surface tension for thorough removal of impurities.

Facilitates smooth blending of oil and water for stable, comfortable product textures.

Helps disperse fragrances evenly, contributing to pleasant sensory experiences in formulas.

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 for daily routines.
Those prone to Malassezia-related skin issues, as it may support fungal growth.
People with non-comedogenic needs, as it rates low for pore-clogging potential.
People sensitive to ethoxylated ingredients or PEG compounds.
Users of fragranced or emulsified products like toners and body washes.
Individuals preferring minimalistic, PEG-free formulations.

Safety Notes

  • Rated low to moderate hazard by EWG, considered safe for cosmetic use by expert reviews.
  • Typically non-comedogenic, suitable for acne-prone skin in that regard.

Frequently Asked Questions about PEG-40 Hydrogenated Castor Oil

What does PEG-40 Hydrogenated Castor Oil do in products?

It acts as a surfactant for cleansing, emulsifier for blending phases, and solubilizer for fragrances in waters and cleansers.

Is it safe for sensitive skin?

Generally mild per safety reviews, though those with PEG sensitivity may prefer alternatives.

Does it clog pores?

Rated non-comedogenic, making it suitable for many skin types without pore concerns.