Guar Hydroxypropyltrimonium Chloride. Dehyquart® Guar HP by BASF acts as a conditioning agent. It is a cationic quaternized guar flour. Its compatibility with anionic surfactants makes it a universally usable cationic polymer in shampoos and hair after-treatment agents with high conditioning performance. Dehyquart® Guar HP finds application in formulating shampoos, colorants, baby-care & facial cleansers, liquid soaps and shower & bath products.