Purple Blood Collection Tube

Features of the Purple Top Blood Tube Additive: The purple top tube contains EDTA as an anticoagulant and a preservative. EDTA helps prevent blood clotting by binding calcium ions, which are necessary for the coagulation process. Lavender Color: The distinctive lavender color of the stopper helps healthcare professionals easily identify the tube and differentiate it from other types of blood collection tubes. 100pk.