A conditioning chemical added to hair products for easy detangling.
Guar Hydroxypropyltrimonium Chloride is a water-soluble derivative of natural guar gum, and delivers conditioning properties to shampoos and after-shampoo hair care products.
No adverse side effects could be find for Guar Hydroxypropyltrimonium Chloride and it has been approved for use by the Environmental Working Group.
None are recorded.
Source: TruthinAging, https://www.truthinaging.com/ingredients/guar-hydroxypropyltrimonium-chloride