Acid Thickener Rx is a nonionic surfactant designed to build viscosity in acid media. Acid Thickener Rx surfactant may be used alone in hydrochloric acid, or in combination with sodium chloride (salt) when used with other acids (such as phosphoric, sulfuric, hydrofluoric, citric, oxalic, etc.) Varying the use level of Acid Thickener surfactant (and salt) will vary the viscosity build. Acid Thickener Rx is a versitle, broad spectrum non phenolic biocide & Fungicide for leather, paper, paint, textile,wood and water treatment , free from penta - chlorophenate.