Standards: Meets ISO 22241. Kleen Def Diesel Exhaust Fluid 2.5 Gal Use With: SCR Systems. A Mixture of 32.5% High Purity Synthetic Urea and 67.5% Deionized Water. Item Helps to Convert Nitrogen Oxide to Harmless Nitrogen and Water. Non-Flammable, Non-Toxic and is Classified As Minimum Risk for Transportation. Injected Into the Exhaust Stream with A Specialized Dosing Module

