Protein Gel-Loading Dye for SDS-PAGE, 2X, CAS Number-56-81-5, 77-86-1, 151-21-3, 7647-01-0, 5mL, 0.15 to 0.35 AU at 252nm, 0.25 to 0.40 AU, 0.32 to 0.47 AU, Gray, Purple, Sodium Dodecyl Sulfate (<5%), Glycerol (<12%), Tris (<1.0%), Proprietary Component (<2%), and Water (80%)., DNase free, Pass Test