A biodegradable primary alcohol ethoxylate initiated by a C9-11 alcohol and ethoxylated with an average of 6 mol EO. This nonionic surfactant is an exceptional detergent, wetting agent and dispersant in various applications ranging from household detergents to oilfield applications. TERGITOL™ 91-6 is recommended as an NPE replacement, as the product meets the U.S. EPA Safer Choice Program’s criteria and is listed as a Safe Chemical Ingredient.