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What it does: emulsifying, surfactant/​cleansing 

The science

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 hair-care product formulations. It’s mostly used as an emulsifier and surfactant but most often it is used to solubilize fragrances into water-based formulas.

PEG-40 hydrogenated castor oil offers a consistent thoroughly-blended feel to products, combines immiscible ingredients, maintains product transparency and clarity, and enhances spreadability of product on skin.

Benefits for your hair

Gently cleanses and soothes the scalp

PEG-40 hydrogenated castor oil  cleanses and soothes the scalp. It also creates foam in cleansing products. 

TLDR 

PEG-40 hydrogenated castor oil is a solubilizer and thickener. It gives texture to our products and combines immiscible ingredients.