Guar hydroxypropyltrimonium chloride

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Guar hydroxypropyltrimonium chloride is a chemical found in many popular shampoos like Organics or Head & Shoulders. It is a water-soluble quaternary derivative of natural guar gum, and imparts conditioning properties to shampoos and after-shampoo hair care products. The effects of the cationic charge density, guar concentration in aqueous solution, and treatment time on bleached European hair were studied. An mechanical testing method developed by M.L. Garcia and J. Diaz (2) was successfully applied to determine the efficacy of cationic guars to improve the ease of combing. The results were confirmed in a shampoo formulation on both virgin and bleached hair.