Tulip Calcium Chloride is a ready-to-use solution standardized at 0.025 mol/l concentration, specifically designed for use with APTT (Activated Partial Thromboplastin Time) reagents. It's a recalcification reagent used in coagulation testing to assess the intrinsic pathway of the coagulation cascade. The solution is stable at room temperature, and the shelf life is indicated on the vial label.