What is PEG-40 Hydrogenated Castor Oil used for in cosmetics?

It is mainly used as a solubilizer to mix oil-based ingredients into water-based formulas and as an emulsifier to stabilize product formulations.

Is PEG-40 Hydrogenated Castor Oil safe for all skin types?

While generally well-tolerated, individuals with very sensitive or compromised skin may experience mild irritation, especially at higher concentrations.

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PEG-40 Hydrogenated Castor Oil

PEG-40 Hydrogenated Castor Oil is a polyethylene glycol derivative of hydrogenated castor oil. It functions primarily as a solubilizer, allowing oil-soluble ingredients like fragrances and essential oils to be evenly dispersed in water-based cosmetic products. It also acts as an emulsifier, helping to stabilize oil-in-water formulations, and can contribute to the product's texture.

SolubilizerVegan

BenefitNone 0 / 4

RiskLow 1 / 4

Irritation i1 / 4

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

Sensitization i0.5 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

Eye irritation i0.5 / 4

Whether it may sting or irritate around the eyes. Relevant for sunscreens, fragrances, acids, surfactants, and volatile ingredients.

Rated by SpottyLabs' ingredient methodology, independent of brands.

Things to watch

Potential for mild irritation in sensitive individuals
May increase penetration of other ingredients

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Products with PEG-40 Hydrogenated Castor Oil

Lumene

Nordic-C [Valo] Glow Boost Essence

4.4/ 515/16/7

Rilastil

Acnestil Gel Detergente Purificante

4.2/ 516/21/7

A-Derma

Exomega Control Emollient Shower Oil

4/ 55/17/4

APIVITA

Express Beauty Purifying & Oil-Balancing Black Face Mask

3.9/ 513/11/11

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Frequently asked questions

What is PEG-40 Hydrogenated Castor Oil used for in cosmetics?: It is mainly used as a solubilizer to mix oil-based ingredients into water-based formulas and as an emulsifier to stabilize product formulations.
Is PEG-40 Hydrogenated Castor Oil safe for all skin types?: While generally well-tolerated, individuals with very sensitive or compromised skin may experience mild irritation, especially at higher concentrations.