TETA Epoxy Hardener Light Yellow Transparent Liquid Amine Curing Agent 90-72-2 TETA (triethylenetetramine) is a light yellow transparent liquid epoxy curing agent (CAS 90-72-2). It converts liquid epoxy resin into a solid, durable and thermoset material and is widely used as an industrial epoxy curing agent for coatings, castings, adhesives and electrical insulation. Product Details CAS No.: 90-72-2 Viscosity (Mpa.S, 25°C): 120-260 Color (Gardner): 2-3 Purity (%): 97 Min