Material Safety Data Sheets for GKK-407 Signal™ DMB Labeling Kit WS0028 Vial A Reaction Solution (Acetic acid & Beta-mercaptoethanol) WS0029 Vial B Reductant (Sodium Dithionite) WS0030 Vial C DMB Dye WS0031 Vial D Release Agent (Acetic Acid)