Hepatocyte Wash Medium Hepatocyte Wash Medium is an enriched Williams' Medium E for the reduction of cell membrane leakage, ease of centrifugation and high viability. Form: Liquid Volume: 500 ml Product Size: 500 mL Green Features: Sustainable packaging Shipping Condition: Room Temperature Regulatory Statement: For Research Use Only. Not for use in diagnostic procedures. Store in refrigerator (2–8°C) and protect from light.