All About PEG 40 Hydrogenated Castor Oil
Published by hstables@newdirectionsaromatics.com BigCommerce on 28th Apr 2026
December 7, 2018
All About PEG 40 Hydrogenated Castor Oil
PEG 40 Hydrogenated Castor Oilis a multifunctional cosmetic ingredient derived from hydrogenated castor oil and polyethylene glycol, widely used as a surfactant, emulsifier, solubilizer, emollient, and fragrance carrier in personal care formulations. Known for its ability to blend oil and water-based ingredients, it helps create stable, clear, and well-textured products while improving spreadability and cleansing performance. Commonly found in cleansers, lotions, shampoos, and makeup, it also contributes to foam formation and a smooth, conditioned feel on skin and hair.
What Is PEG 40 Hydrogenated Castor Oil?
PEG 40 Hydrogenated Castor Oil is the Polyethylene Glycol derivatives of Hydrogenated Castor Oil, and it functions as a surfactant, a solubilizer, an emulsifier, an emollient, a cleansing agent, and a fragrance ingredient when added to cosmetics or personal care product formulations. NDA’s PEG 40 Hydrogenated Castor Oil is a semi-solid ingredient.
How Does PEG 40 Hydrogenated Castor Oil Work?
PEG-40 Hydrogenated Castor Oil is soluble in both water and oil and is traditionally used to emulsify and solubilize oil-in-water formulations. Its foam-enhancing properties make it ideal for use in liquid cleansers, and its soothing and softening emollient quality makes it a popular addition to formulations for moisturizers and hair care cosmetics. As a surfactant, PEG 40 Hydrogenated Castor Oil helps to decrease the surface tension between multiple liquids or between liquids and solids. Furthermore, it helps to remove the grease from oils and causes them to become suspended in the liquid. This makes it easier for them to be washed away and lends this ingredient popularity in facial and body cleansers. As an occlusive agent, PEG 40 Hydrogenated Castor Oil creates a protective hydrating layer on the skin’s surface, acting as a barrier against the loss of natural moisture.
PEG 40 Hydrogenated Castor Oil Solubility
When adding PEG 40 Hydrogenated Castor Oil to cosmetics formulations, it can be blended in its cold state directly into the oil phase at a suggested ratio of 3:1 (PEG 40 Hydrogenated Castor Oil to oil). Next, this can be added to the water phase. If the formula is cloudy, the amount of PEG 40 Hydrogenated Castor Oil may be increased for enhanced transparency.
PEG 40 Hydrogenated Castor Oil is a versatile cosmetic ingredient that helps blend oil and water, stabilize formulations, enhance cleansing and foam, and improve texture, clarity, and skin conditioning in personal care products.
PEG 40 Hydrogenated Castor Oil Uses
Product Types & Functions
When added to formulations such as:
- Liquid Soap, Facial Cleanser, Bubble Bath, Shower Gel
- Face Cream, Lotion, Sunscreen
- Makeup, Face Mask, Skin Peel, Deodorant
- Shampoo, Conditioner
PEG 40 Hydrogenated Castor Oil functions as a:
- Surfactant
- Solubilizer
- Emulsifier
- Emollient
- Cleansing Agent
- Fragrance Ingredient
Benefits in Cosmetic Formulations
It helps to:
- Combine immiscible ingredients
- Gently cleanse and soothe the skin and scalp
- Create foam in cleansing products
- Offer a consistent, thoroughly-blended feel to products
- Maintain product transparency and clarity
- Enhance spreadability of product on skin
Recommended Usage Rates
The recommended maximum dosage is 1-25%.
PEG 40 Hydrogenated Castor Oil Side Effects
As with all other New Directions Aromatics products, PEG 40 Hydrogenated Castor Oil Raw Material is for external use only. It is imperative to consult a medical practitioner before using this product for therapeutic purposes. Pregnant and nursing women as well as those with sensitive, irritated, broken, injured, or damaged skin are especially advised not to use PEG 40 Hydrogenated Castor Oil Raw Material without the medical advice of a physician. This product should always be stored in an area that is inaccessible to children, especially those under the age of 7.
Prior to using PEG 40 Hydrogenated Castor Oil Raw Material, a skin test is recommended. This can be done by dissolving 1 tsp PEG 40 Hydrogenated Castor Oil Raw Material in 1 tsp of a preferred Carrier Oil and applying a dime-size amount of this blend to a small area of skin that is not sensitive. PEG 40 Hydrogenated Castor Oil must never be used near the inner nose and ears or on any other particularly sensitive areas of skin. Potential side effects of PEG 40 Hydrogenated Castor Oil include the itching, blistering, burning, and scaling of skin as well as hives. In the event of an allergic reaction, discontinue use of the product and see a doctor, pharmacist, or allergist immediately for a health assessment and appropriate remedial action. To prevent side effects, consult with a medical professional prior to use.